Oferty pracy Backend Developer — Polska — Strona 2293+ Ofert

Przeglądaj oferty pracy backend developer. Node.js, Python, Java, Go i więcej. Znajdź swoją następną rolę. Kraj: Polska. Strona 2.

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FX Trading Systems Engineer (Java Backend)

Vistulo (for a major N. American bank) · Poland

FX Trading Systems Engineer (Java Backend) Join the Fixed Income Trading Systems Team at a top N. American Bank This isn’t just another dev role. It’s your chance to engineer the core of global trading. We’re talking ultra-low-latency architectures, real-time market data, and automation at scale — all in an environment where milliseconds matter and billions move. You’ll work on greenfield and semi-greenfield projects, building FX (forex) trading workflows. If you thrive on complexity, love solving performance challenges under pressure, and want to collaborate directly with traders and product teams at the sharp edge of financial technology — this is your arena. The Role at a Glance Senior Java Backend Engineer Building a FX trading systems, including high-performance backend services for algorithmic order management and order routing. 270zł - 300zł / hr B2B net + VAT Fully remote for a top N. American bank (for residents of Poland only) This role requires experience building trading systems, specifically with order routing or algorithmic order management. If you enjoy working on low-latency, high-throughput trading systems, join us and build the next generation of high-performance capital markets solutions. Why Join Us? Work on a large-scale, low-latency trading system. No Legacy: Join an actively developed system — the engineers who built it originally are still on the team. Collaborate with a world-class team of developers across North America and Europe. Enjoy the stability of a long-term, fully remote role that only a bank can offer. A successful candidate will be a very strong programmer with current Java development experience. They must also be curious, open-minded, and desire to learn new things. English proficiency is a must. This role is for developers who excel at programming core Java from the ground up, not just integrating frameworks or APIs. If you’re fascinated by understanding systems ‘under the hood,’ this role is for you. Successful candidates enjoy geeking out about data structures and debugging application performance issues. This is a fully remote backend Java development role for a developer in Poland. You will be working through a Polish company that will provide the support and administrative assistance to make you successful in the role. We are looking for people to join the team long-term. Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland, are welcome. What we offer Work that matters in the financial domain: You’ll be building high performance trading system at an established financial institution. Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment. Direct collaboration: You will work directly with the client team in North America and in Poland. 1st-tier work: This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team. Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term. Flexibility & remote work: Fully remote position based in Poland with increasing schedule flexibility post-onboarding. Competitive Compensation: Top pay and ample time-off options. Responsibilities Design and implement robust software solutions for FX trading systems using core Java. Build high-performance backend services that algorithmically manage and route orders. Create thorough test cases to ensure software stability and reliability. Collaborate with operations teams regarding building new features and improving existing functionality. Requirements Must have Current Java programming experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries. Good knowledge of the data structures: familiarity with the Java collections framework, depth of understanding of the commonly used data structures, intuition on what to use when. Proven experience building backend services for front-office trading systems. Deep understanding of front-office workflows and electronic trading platforms (any asset class). Built or contributed to the algorithmic order management systems or order routing systems (any asset class). Expertise in multi-threading, event-driven systems, and performance tuning. Ability to break down complex workflows into maintainable, high-quality solutions. Strong communication skills and comfort working in high-stakes, trader-facing environments. Knowledge that is required for building low-latency (measured in microseconds) trading systems. Ability to align your work with a 6 hour overlap with US Eastern business hours. Nice to have Experience with trading protocols or FX trading systems. Exposure to time-series databases and market data integration. Familiarity with algorithmic workflows and pricing engines. A computer science degree from a top Polish school. The recruitment process Submit your CV. Answer a few written questions and a short programming exercise, which you can do at your own pace. Participate in an online three-stage interview process:Technical screen interviewThree technical interviews with future team membersDiscuss your experience and skills.Solve verbal algorithm problems (focus on clarity and understanding).Tackle live coding challenges (no trick questions). Successful candidates will need to pass a standard background check.

Full TimeRemotedirectBackend
PLN 270 - 300/hour1 month ago
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We're not just building an ecommerce platform. We’re reshaping how fashion & lifestyle brands scale globally.Our API-first, headless SaaS platform supports over 300 brands in delivering localized, high-performance shopping experiences across 120+ countries. Backed by a 50 million SEK investment from the H&M Group, we power leading names like COS, ARKET, & Other Stories, Weekday, Nudie Jeans, and Paul Smith. Brands trust Centra to run operations in 20+ markets - a reflection of the platform’s flexibility and efficiency.Why Join Centra?Our engineers are deeply involved in solving real business challenges, not just writing code. You’ll work closely with cross-functional teams to build solutions that directly impact the success of internationally recognized brands.We support continued progress through both technical mastery and leadership opportunities, whether you want to deepen your expertise, shape architecture, mentor others, or lead teams. You’ll have the freedom and support to advance in the direction that suits you best.What You’ll Do.You’ll tackle performance-critical systems, apply domain-driven design and use modern architecture patterns. Whether it’s designing an API or optimizing cross-border flows, your contributions will have both technical depth and business relevance. You’ll take real ownership of your work and help shape our technical direction.What We’re Looking For.Strong experience with modern PHP. Knowledge of GraphQL and REST APIs is a plusPassion for performance, clean code and software engineering best practices like CI and observabilityA problem-solving mindset and sharp attention to detailCollaborative spirit and strong communication skills, with fluency in EnglishProven ability to incorporate AI coding tools into development workflows while maintaining high standards of code quality and engineering disciplineStrong knowledge of web application security, including common vulnerabilities (e.g. XSS, SQL injection, CSRF, SSRF, command injection) and how to prevent them in practiceExperience implementing secure authentication and data protection patterns, including OAuth 2.0 / OIDC, MFA, session security, encryption (in transit and at rest), and secure secret managementFamiliar with modern security and operational practices, including secure HTTP standards (CORS, CSP, HSTS), dependency auditing (CVEs), rate limiting, least privilege, and integrating security into CI and observability workflowsOur Recruitment Process.Introductory Interview: Meet our recruiter, discuss your experience and expectations. (Online, 30–45 min)Technical Interview: Dive into technical discussions. (Online or onsite 1.5–2h)Ways of Working Interview: Explore your alignment with our values and meet the team. (Online or onsite, 1h)Logistics and Location.This team is Wroclaw based. We operate an office-first, hybrid working model. You can work up to ten days per month remote. We are open to CoE and B2B working.Equality.We’re committed to fair, inclusive hiring and to building a team with diverse perspectives. If you need adjustments during the process, please let us know.

Full TimedirectBackend
Salary not disclosed5 months ago
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Empower the future of digital financial services — lead innovative backend solutions at the forefront of global disbursements! Krakow-based opportunity with hybrid work model. As a Senior Java Backend Engineer – Test Automation & Microservices, you will be working for our client, a leading provider of payment platform solutions that enable seamless, fast, and secure transfer of funds worldwide. Your expertise will drive the development of scalable backend services, shaping the core infrastructure that empowers organizations to deliver financial services effortlessly on a global scale. Join us to be part of a pioneering team revolutionizing the payments industry through innovation and precision. Your main responsibilities: Provide technical leadership and mentorship to a team of engineers, guiding them to success Lead the design and development of backend services and microservices using Java 8/11/17 Drive the team’s strategy for automated testing, promoting best practices and overseeing the implementation of automation frameworks to reduce costs Architect solutions to reduce cost and complexity by migrating to modern integration patterns like APIs, Kafka, or microservices Oversee the enhancement of Straight-Through-Processing (STP) capabilities of services You're ideal for this role if you have: At least 10 years of professional experience in software engineering At least 3 years of experience in a technical leadership or lead developer role Strong proficiency in Java 8+ (Java 17+ preferable) Deep understanding of microservices architecture, design patterns, and best practices Advanced, hands-on experience in software testing, including designing and implementing test automation frameworks Knowledge of Spring/Spring Boot Working understanding of RESTful microservices and APIs Experience with database technologies and SQL (Oracle preferred) It is a strong plus if you have: (optional) Experience with Test-Driven Development (TDD) methodologies Knowledge of scripting languages (e.g., Python, Bash) Experience working in a QA team Language Required for the role: Fluent English Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role.

Full TimedirectBackend
PLN 27,300 - 31,500/month5 months ago
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SENIOR .NET DEVELOPER

Sigma Embedded Engineering AB · Poland

Required skills Software Architecture / strong Databases (SQL & NoSQL) / strong Looking to take your .NET expertise to the next level while working on high-impact FinTech solutions? This role offers the chance to contribute to scalable, cloud-native systems that empower thousands of businesses worldwide. We’re seeking a Senior .NET Developer to join our team, collaborating with talented engineers, product managers, and designers to deliver innovative financial technology. At Sigma Software, we work with some of the most forward-thinking companies in the industry. This opportunity will let you grow professionally while making a tangible difference in a fast-paced, regulated environment. Customer Our customer is a leading FinTech company providing embedded financing solutions for platforms and marketplaces. Their mission is to enable businesses to offer flexible credit products to customers, helping SMEs access funding quickly and efficiently. The customer is recognized for innovation in embedded finance, serving thousands of businesses globally and partnering with major platforms. They operate in a regulated environment with a strong focus on scalability, performance, and security. Project The project involves enhancing and expanding customer’s embedded finance platform, which integrates directly into partner services to deliver fast, flexible funding to SMEs. You’ll work on a modern tech stack, building features that improve customer and partner experiences while ensuring reliability in production. Key Technologies: C#, .NET Core, Angular 18, AWS, CI/CD, Docker/Kubernetes, Kafka/RabbitMQ, Datadog, relational & NoSQL databases

Full TimedirectBackend
Salary not disclosed1 week ago
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About Complete RobotWe are an early-stage, venture-backed company currently operating out of San Francisco, building AI-enabled systems for automated physical environments.The company works at the intersection of AI agents, connected devices, user experience, machine data, and real-world commercial operations. Complete Robot Inc. was founded by Tomasz Stańczak, founder of Nethermind.To learn more about the company, vision, and the technology we're building, visit the Complete Robot website.About RoleWe are expanding our Team and are looking for a Backend / Telemetry Engineer to build the cloud systems that support connected physical devices and real-world deployments. This is a backend role for someone who wants to work on machine data, events, fleet infrastructure, dashboards, APIs, and operational systems.Responsibilities:Build backend services for telemetry, device state, events, dashboards, and partner integrations.Design data models for machines, locations, users, events, status, diagnostics, and operational activity.Build APIs for edge devices, internal tools, dashboards, and AI workflows.Implement event ingestion pipelines, monitoring, alerting, and audit logs.Work with embedded engineers on device-to-cloud protocols.Work with product and business teams to define the data needed for demos, pilots, and customer reporting.Support security, reliability, observability, and scalability from the beginning.Requirements:Strong backend engineering experience.Experience building production systems, APIs, databases, event pipelines, or telemetry platforms.Strong programming ability in TypeScript, Python, Go, Java, Kotlin, Rust, or similar.Experience with relational databases, time-series data, queues, event streaming, or cloud infrastructure.Understanding of authentication, authorization, logging, monitoring, and secure system design.English fluency required.Must Haves:Experience with IoT, fleet management, retail technology, payments-adjacent systems, kiosks, robotics, or industrial systems.Experience with high-volume event ingestion or real-time monitoring.Experience with dashboards, analytics, alerting, field-service tools, or operational reporting.Experience with transaction-like event flows, reconciliation, audit trails, or financial-grade data systems.Success in the first 90 days:You build the first reliable telemetry backend for prototypes and pilots.Devices can register, send events, report health, and expose useful data.The team has clear data models and APIs.You create observability that makes field debugging possible.Success in the first 6-12 months:The backend supports multiple pilot environments and connected devices.The platform can show machine status, operational events, diagnostics, and performance data.You become a key owner of the data and telemetry platform.

Full TimedirectBackend
Salary not disclosed3 months ago
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Senior .NET Developer – Banking and Financial Solutions

ITDS Polska Sp. z o.o. · Warszawa, Poland

Senior .NET Developer – Banking and Financial Solutions Warszawa Hybrid .NET Docker Kubernetes MS-SQL PostgreSQL SQL Polish Mid-Level, Senior Banking, Finance Developer Unleash innovation in digital banking — shape the future of financial technology! Warszawa-based opportunity with a hybrid work model (up to 4 days remote per week). As a Senior .NET Developer working for our client, a leader in online banking and financial solutions, you will contribute to advancing secure, high-performance banking platforms. Join a dynamic team dedicated to delivering reliable, innovative digital financial services that transform how users access and manage their finances. This is the perfect environment for driven professionals eager to make an impact in the fintech industry. Your main responsibilities: Design and develop new features in .NET 8 to enhance banking functionalities. Implement and optimize SQL-based data access for high performance. Build and maintain containerized applications using Docker and Kubernetes. Collaborate effectively with distributed teams in an Agile environment. Participate in developing secure payment solutions. Share knowledge and support less experienced team members. Ensure code quality through thorough code reviews and testing procedures. Maintain existing functionalities and resolve production issues. Manage your own time and responsibilities while working remotely. You're ideal for this role if you have: Minimum of 4 years of experience in developing IT systems. Strong hands-on experience with .NET development. Solid knowledge of PostgreSQL and MS SQL databases. Practical understanding of Agile software development methodologies. Excellent communication skills in a distributed team environment. Ability to work independently and manage time effectively. Experience in developing new features and maintaining existing systems. Passion for software development and continuous improvement. Experience with Docker and Kubernetes. It is a strong plus if you have: (optional) Knowledge of banking domain, such as payments and transactions (e.g., Elixir, Sorbnet). Language Required for the role: Polish – Good command (communicative level) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English or Polish) along with a statement confirming your consent to the processing and storage of your personal data.

Full TimedirectBackend
PLN 13,500 - 15,500/month4 months ago
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Junior Backend Engineer, PHP

Droplabs sp. z o.o. · Poland

Junior Backend Engineer, PHP Kim jesteśmy? Droplabs to krakowska firma, która stworzyła system sprzedaży biletów online, wykorzystywany przez największe firmy z branży Tours&Attractions&Activities, jak np. aquaparki, parki rozrywki czy inne atrakcje turystyczne. Naszym celem jest digitalizacja branży rekreacyjno-turystycznej aby wszystkim usprawnić dostęp do najciekawszych atrakcji. Naszymi klientami są m.in. Tatrzański Park Narodowy, Chochołowskie Termy czy Zoo Wrocław. Od 2023 roku propagujemy i wdrażamy w obiektach turystycznych strategię cen dynamicznych. Opieramy ją na własnych rozwiązaniach z zakresu uczenia maszynowego. Pomagają one przewidywać frekwencję i wyciągać maksymalną wartość z dostępności atrakcji w realiach danego sezonu, pogody i prowadzonego marketingu. Dzięki temu nasi klienci mogą podejmować decyzje w oparciu o dane, efektywniej zarządzać dostępnością i zwiększać przychody, a odwiedzający zyskują lepszy dostęp do atrakcji - samodzielnie podejmując decyzje odpowiadające ich preferencjom budżetowym i preferencjom co do terminu wizyty. Jako Junior Backend Engineer w Droplabs będziesz rozwijać kod, który realnie obsługuje sprzedaż biletów dla setek atrakcji turystycznych w Polsce i za granicą - od małych muzeów po największe aquaparki i parki rozrywki, gdzie w szczycie sezonu nasze API musi bez zająknięcia obsłużyć setki tysięcy rezerwacji. Backend produktu wymaga zarówno przemyślanej architektury, jak i dbałości o stabilność w godzinach największego ruchu. Pracując razem z naszym zespołem backendowym, produktowym i AI, będziesz poznawać oraz tworzyć cały cykl życia funkcjonalności - od analizy wymagań i projektowania API, przez implementację i pokrycie testami, aż po wdrożenie i monitorowanie rozwiązania na produkcji. Wymagania Znajomość języka PHP 8+. Znajomość baz MySQL. Znajomość gita. Znajomość narzędzi agentowych np. Claude Code. Umiejętność pisania testów jednostkowych w phpunit. Umiejętność dobierania adekwatnych rozwiązań do napotkanych problemów. Umiejętność pisania czystego kodu i wykorzystywania wzorców projektowych. Mile widziane Znajomość frameworka Symfony 6+ Znajomość AWS i narzędzi DevOps-owych. Doświadczenie z Dockerem i Docker Compose w środowiskach deweloperskich i produkcyjnych. Znajomość asynchronicznego przetwarzania i kolejkowania zadań (Symfony Messenger, SQS). Podstawy CI/CD (GitHub Actions, GitLab CI). Obowiązki Aktywny rozwój produktu pod względem funkcjonalności. Utrzymanie backendu platformy Droplabs. Projektowanie i wdrażanie skalowalnych rozwiązań API. Pisanie testów: jednostkowych, funkcjonalnych, integracyjnych. Code review i dbanie o standardy jakości w zespole. Śledzenie trendów backendowych i proponowanie rozwiązań adekwatnych do potrzeb biznesowych. Co oferujemy? Praca nad produktem w ciekawej branży, z którego korzystają każdego miesiąca setki firm oraz miliony klientów tych firm. Pracę nad produktem, z którego można samemu często korzystać. Program zwrotów pieniędzy za bilety zakupione do naszych klientów. Kącik baristy, gdzie przygotowujemy kawę z Kolumbii, czy Brazylii. Integracje przez wspólne wycieczki oraz wyjścia. Szczegóły Praca w pełnym wymiarze na B2B / umowie zlecenie / umowie o pracę. Wynagrodzenie 7 500 – 10 500 zł netto miesięcznie na B2B lub 6 500 - 9 000 zł brutto na UoP/UZ. Praca stacjonarna w naszym biurze w Krakowie (obok Placu Bohaterów Getta). ‍ Jeżeli chcesz, abyśmy zachowali Twoje CV w naszej bazie na potrzeby przyszłych rekrutacji, umieść dodatkowo w swoim zgłoszeniu następującą zgodę: „Zgadzam się na przetwarzanie przez firmę Droplabs sp. z o.o. danych osobowych zawartych w moim zgłoszeniu rekrutacyjnym dla celów przyszłych rekrutacji” Przesyłając nam swoje zgłoszenie rekrutacyjne, wyrażasz zgodę na przetwarzanie swoich danych przez Droplabs Sp. z o.o. z siedzibą w Krakowie, ul. Na zjeździe 11, 30-527 Kraków, KRS: 0000468242, NIP:6772375967, REGON: 12289459500000, w celu przesyłania wzięcia udziału w procesie rekrutacyjnym. Przysługuje Ci m.in. prawo do dostępu do danych, ich sprostowania oraz wyrażenia sprzeciwu wobec przetwarzania. Przesyłając zgłoszenie, oświadczasz także, że zapoznałeś się z Klauzulą Informacyjną.

Full TimedirectBackend
Salary not disclosed1 week ago
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Empower cloud-native innovation — shape the future of backend development with cutting-edge technology! Krakow-based opportunity with hybrid work model (2 days in-office / 3 days remote). As a Senior Cloud-Native Java Developer, you will be working for our client in the financial industry, designing and building scalable backend services and cloud-native applications. You’ll focus on leveraging Java, Kubernetes, and cloud platforms to deliver robust, secure, and efficient solutions that power digital transformation and enhance operational excellence. Your main responsibilities: Develop and maintain backend services using Java (Spring Boot or similar frameworks). Design and deploy microservices on Kubernetes clusters. Implement CI/CD pipelines and automate deployments on cloud platforms (AWS, Azure, GCP). Monitor, troubleshoot, and optimize application performance. Ensure security and compliance standards are met. Collaborate with cross-functional teams to deliver end-to-end solutions. You're ideal for this role if you have: 4+ years of experience in Java development and microservices architecture. Hands-on experience with Kubernetes and containerization (Docker). Familiarity with cloud platforms and infrastructure-as-code tools (e.g., Terraform, Helm). Experience with CI/CD tools (Jenkins, Ansible). Strong analytical and troubleshooting abilities. It is a strong plus if you have: Certifications in cloud platforms or Kubernetes. Language Required for the role: Fluent English command. Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role.

Full TimedirectBackend
PLN 23,100 - 28,350/month5 months ago
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Senior Backend Developer

Kolomolo · Kraków, Slavic Europe, PL

<h4>🚀 Senior Backend Developer</h4><p><strong>Location: </strong>Kraków, Poland</p><p><strong>Experience:</strong> 5+ years</p><p><strong>Contract:</strong> B2B, Full-Time<br><br><strong>Join the Future of Digital Tech with Kolomolo</strong></p><p>At <strong>Kolomolo</strong>, we don’t just follow trends - we set them. As a global supplier of IT services and digital modernization solutions, we help businesses embrace cutting-edge technology to optimize their operations. Now, we are growing and looking for fresh talent to grow with us.</p><p><em>Are you proactive, tech-savvy, and eager to build your career in IT? </em><strong><em>This role could be your perfect fit.</em></strong></p><h4><strong>About the Role</strong></h4><p>We’re looking for a Senior Backend Developer who enjoys building reliable, scalable, and modern cloud-native applications.</p><p>In this role, you’ll be responsible for backend feature development, system modernization, test automation, code refactoring, and production deployments. You’ll work on distributed systems and microservice-based architectures while contributing to the design and development of secure and high-performing backend solutions.</p><p>This role is ideal for someone who combines strong technical expertise with a collaborative mindset and enjoys working in agile, engineering-driven environments.</p><h5>What You’ll Be Doing</h5><ul><li><p><span>Develop microservices based on Typescript &amp; NodeJS for core business components.</span></p></li><li><p><span>Design and develop company’s internal IAM microservice, preparing for a migration on a new solution.</span></p></li><li><p><span>Design and develop cloud native applications based on AWS services like Lambda, API Gateway, DynamoDB and EventBridge.</span></p></li><li><p><span>Creating and running automated tests, particularly integration tests and end-to-end tests for the backend layer.</span></p></li><li><p><span>Work closely with Architects &amp; SRE to follow security &amp; reliability standards while being  actively involved in architectural discussions.</span></p></li><li><p><span>Work with external partners &amp; vendors while developing various integrations.</span></p></li><li><p><span>Collaborate with the team and drive it while ensuring high code quality and standards.</span></p></li><li><p><span>Be actively involved in designing and developing reliable &amp; secure backend features/functions.</span></p></li><li><p><span>Work with continuously delivered (CI/CD), asynchronous and distributed systems</span></p></li></ul><h6>Tech stack</h6><ul><li><p><span><strong>Runtime: </strong>Serverless (Lambda, API Gateway, EventBridge)</span></p></li><li><p><span><strong>Backend:</strong>  NodeJS / Typescript (additional Java or Python)</span></p></li><li><p><span><strong>Persistency:</strong> DynamoDB, S3, SNS, SQS</span></p></li><li><p><span><strong>Architecture:</strong> Microservices</span></p></li><li><p><span><strong>IAM:</strong> oAuth2, OIDC Connect, JWT, OPAL</span></p></li><li><p><span><strong>CI/CD:</strong> GitLab</span></p></li><li><p><span><strong>QA:</strong> Playwright/ Postman/ Jest</span></p></li><li><p><span><strong>Infrastructure: </strong>AWS, Kubernetes, AWS CDK, Terraform</span></p></li></ul><h5>What We Are Looking For</h5><ul><li><p><span>Min. 5 years of experience as a backend/full stack developer, with recent projects in TypeScript &amp; NodeJS and other backend programming language (preferably Java or Python).</span></p></li><li><p><span>Experience in creating and running test automation with holistic approach including system, performance smoke and E2E tests (full testing pyramid) on Jest/Postman/Playwright.</span></p></li><li><p><span>Ability to share your knowledge, experiences, and opinions on the forum via technology demos/brainstorming sessions.</span></p></li><li><p><span>Willingness to grow and learn with a passion for creating new solutions.</span></p></li><li><p><span>Experience in working closely with product and design teams as well as doing pair programming in small, agile, and cross-functional teams.</span></p></li><li><p><span>Ability and openness to work in a team, especially within a culture of mutual respect and continuous feedback.</span></p></li><li><p><span>Being a Team Player, able to help people to grow and guide decision-making processes.</span></p></li><li><p><span>Open minded, communicative and focused on delivering business value .</span></p></li><li><p><span>Fluent verbal and written skills in Polish and English.</span></p></li></ul><h5>Nice to Have</h5><ul><li><p>Familiarity with Customer Identity Access Management systems &amp; solutions (CIAM), ideally with proven record in designing and implementing.</p></li><li><p><span>Experience in Infrastructure as a code especially Terraform/ AWS CDK.</span></p></li><li><p><span>Developing &amp; maintaining team’s monitoring dashboards in Grafana stack (Prometheus, Looki).</span></p></li></ul><p><strong>What is in It for You</strong></p><ul><li><p>Competitive salary and benefits.</p></li><li><p>Career development opportunities in a growing tech company.</p></li><li><p>Continuous learning culture: mentorship, internal training, and certifications.</p></li><li><p>Flexible, agile work environment (remote, hybrid, or on-site in Kraków).</p></li><li><p>Office perks: great coffee, tea, fresh fruit, snacks, and a fun atmosphere.</p></li><li><p>Flat management structure, where your voice matters.</p></li><li><p>Regular team events and a social, supportive work culture.</p></li><li><p>Independent Contractor.</p></li></ul><h5>🌟 <strong>Why Join Kolomolo?</strong></h5><p>At <strong>Kolomolo</strong>, we prioritize innovation, agility, and autonomy. Our teams have the freedom to own their work, share ideas, and make meaningful contributions. Inspired by <strong>Scandinavian values</strong>, we believe in <strong>work-life harmony</strong> and creating an inclusive culture where everyone thrives.</p><p>You will be part of a passionate, skilled, and friendly team that works hard and celebrates together. Here, you can build your career on your own terms, with opportunities to grow, learn, and make a real impact.</p><h5><strong>Our Flat Structure &amp; The Culture of Inclusion</strong></h5><p>At Kolomolo, we break the corporate mold. We offer:</p><ul><li><p><strong>Agile Teams &amp; Autonomy</strong>: No micromanagement. You’ll own your projects and enjoy the freedom to innovate.</p></li><li><p><strong>Work-Life Harmony</strong>: Inspired by Scandinavian values, we prioritize balance and flexibility, where remote work and asynchronous collaboration are in our DNA.</p></li><li><p><strong>Learning &amp; Growth</strong>: Continuous learning is at our core. We reward hard work, value smart ideas, and foster an environment of mutual respect and trust.</p></li><li><p><strong>Inclusive Culture</strong>: We believe in DEI: diversity, equity and inclusion. We are committed to creating an environment where every individual, regardless of background, identity, or experience feels valued, respected, and empowered to thrive.</p></li></ul><p>Join Kolomolo and elevate your career with cutting-edge technology, a supportive team, and a company that truly values your input.</p><p></p><p>Ready for the next step? <strong>Apply now</strong> and start an exciting journey of growth and innovation with us!<br></p>

Full TimeRemotedirectBackend
Salary not disclosed3 months ago
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Senior Agentic Backend Engineer

beqom · Krakow, Malopolskie, Poland

Join beqom — where tech meets impact beqom is a high-growth B2B SaaS company that provides industry-leading tools for pay equity and transparency, compensation, and performance management. Trusted by some of the world’s most respected companies, beqom enables HR and business leaders to navigate global compliance and make smarter pay decisions that attract, retain, and motivate top talent. Founded in Switzerland and serving clients worldwide, our powerful, enterprise-ready products are fuelled by beqom pay intelligence. Role Overview We are looking for a Senior Agentic Backend Engineer to join our Data Platform Core team, which owns the services at the heart of beqom’s data architecture — multi-tenant data ingestion, schema management, snapshots, calculated fields, and the data contracts powering analytics and reporting across the product. In this role you will not write the code. AI agents will. You will own the specifications that govern these services, the agentic pipeline that turns those specifications into production software, and the verification machinery that proves the output is correct — with the explicit goal of reaching fully AI-embedded development: no human-written code, no human line-by-line review, and external behavioural scenarios, not traditional test suites, as the quality gate. You will collaborate closely with Data Platform and Analytics engineers, Support teams, and Product stakeholders — translating their needs into agent-executable specifications. Specs are our system of record; agents do the typing. What you'll be doing Agentic Delivery Deliver features across multi-tenant data platform services — data ingestion, schema management, effective dating, snapshots, calculated fields, and exports — exclusively through AI agents working from your specifications. Author structured, testable Product Requirement Prompts (PRPs) and spec files as the primary engineering artefact, and maintain the versioned spec library that governs the codebase. Run multiple agents in parallel across workstreams; evaluate outcomes against specs; progress agent first-pass success rate, defect escape rate, and the share of changes merged without human review steadily upward. Pipeline Engineering Build and maintain the agentic pipeline: agent harness, blueprint engine interleaving deterministic steps (lint, build, git) with AI reasoning, MCP tool layer exposing internal APIs, warm sandbox pool, and retrieval over the codebase, tickets, and historical PRs. Own the economics of the pipeline: observability over token usage, task latency, and cost per run; model-tier routing and cost-per-outcome gating. Embed governance into the pipeline — machine-generated audit trails, named ownership per feature, data-classification gates keeping production secrets and PII out of agent context. Verification Engineering Engineer verification, not code: external behavioural scenario suites and holdout sets stored outside the codebase (agents never see the evaluation criteria), digital twins of the systems we integrate with, layered AI-reviews-AI gates, and automated remediation for self-healing services. Set and enforce the constraints that keep agent output correct on performance-critical paths: bulk ingestion throughput, large export streaming, memory behaviour, and complex SQL — validated by scenario and load gates rather than line-by-line reading. Production Ownership & Collaboration Diagnose and resolve production data issues through agents — with deep enough functional understanding of every service you own to steer remediation quickly, in collaboration with Support and Engineering. Document the specs, scenarios, and pipeline decisions that govern the platform — artefacts both humans and agents can act on — and help other engineers make the same shift. Skills & Experience What you'll bring Demonstrated senior-level experience building production backend services — including .NET/C# and PostgreSQL systems — with a demonstrable shift from writing code to directing agents: the majority of your recent production output should be AI-generated under your direction. Hands-on mastery of AI coding agents — Claude Code strongly preferred — including parallel agent sessions, custom skills and sub-agents, and structuring codebases and context so agents work reliably. Excellence in specification writing — turning ambiguous business needs into precise, agent-executable PRPs and spec files. In this role, spec quality is the single most load-bearing skill. Strong verification engineering: behavioural and scenario-based testing, holdout evaluation, quality gates, and validation frameworks — the ability to trust and judge output you did not write. Strong architecture judgement: assessing whether an agent-proposed solution meets performance, scalability, and reliability requirements, and challenging designs that will not hold up under real workloads. Experience building agent infrastructure: MCP servers and tool layers, sandboxed execution, and CI/CD adapted for agent-driven workflows. Deep enough .NET/C# and SQL reading fluency to audit generated code when quality gates flag it — schema design, query plans, streaming vs. buffering, memory behaviour. Excellent written communication: specs, scenario definitions, and design docs that both humans and agents can act on. Bonus points if you have Experience building digital twins or service virtualisations of external systems for agent evaluation environments. Experience with LLM evaluation at scale: eval suites, red-teaming AI-generated code, benchmarking agent workflows. Multi-tenant SaaS architecture experience, CDC/event-driven ingestion (Debezium, Kafka, RabbitMQ/MassTransit), or lakehouse exposure (Microsoft Fabric). Azure services, Docker, Kubernetes/Helm. Experience with legal, security, or compliance frameworks for AI-authored code. Familiarity with compensation, HR, or pay transparency domains. Why join us? Your career, your design. Unleash your ambition in our dynamic, autonomous environment. Drive meaningful change. Build a fairer future for every employee by joining a market leader that is improving the world of work. Belong to something bigger. Collaborate with a passionate, diverse and talented team around the globe.

Full TimedirectBackend
Salary not disclosed1 month ago
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558_Middle PHP developer (Laravel) remote IT Full time Gdańsk, Poland Updated Aug. 27 Requirements for a candidate Required skills Experience in PHP Experience in Laravel Experience in PostGress Experience in Amazon Web Services (AWS) Description Overview:Our client is an award-winning UK software provider, with a growing international footprint across the UK and APAC regions. They specialize in developing innovative, multi-tenant SaaS platforms for regulated industries, primarily insurance, that power compliance, claims, and workflows. Their products process critical data, automate complex workflows, and solve major operational challenges for their enterprise clients. Skills and Experience we are looking for:PHP: Strong proficiency in modern PHP (8.x+), OOP principles, SOLID standards, and design patterns.Laravel (2+ years): Eloquent ORM, RESTful API design & development, Service Providers, Artisan, Queues/Jobs, and testing (PHPUnit/Pest).PostgreSQL: Schema design, complex queries, indexing strategies, and query optimization.AWS & Infrastructure: Hands-on experience with EC2, RDS, and S3; basic Docker usage and standard CI/CD deployment pipelines.AI-Assisted Development: Experience integrating terminal and IDE-based AI agents (e.g., Claude Code, Cursor, GitHub Copilot) into daily workflows.Nice to have: Frontend experience with Vue 3 or React.Your responsibilities:Develop scalable, secure, and maintainable software.Collaborate closely with a small, committed team - we are looking for a team member, not just a programmer.Take initiative - we value curiosity, maturity, and proactive problem-solving.Other requirements:Good grasp of software development best practices: architecture, security, scalability.Ability to write clean, readable, and maintainable code. Double-check the AI-generated code.Full proficiency in English, for daily work with teammates from abroad. Powered by CleverStaff

Full TimedirectBackend
Salary not disclosed2 weeks ago
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<h3><strong>Tech stack:</strong></h3><ul><li><p><span>.NET experience in both .NET Framework and .NET Core</span></p></li><li><p><span>Azure Public – knowledge from the Azure Developer 204 course: Azure Functions App Services Service Bus (nice‑to‑have) Storage Accounts, Application Insights</span></p></li><li><p><span>Working with SOAP and REST services: SoapUI Postman Swagger – generation of API definitions</span></p></li><li><p><span>Experience with HTTP files in VS Code</span></p></li><li><p>Fluent in German</p></li><li><p>Fluent in English</p></li></ul><h3><strong>Requirements:</strong></h3><ul><li><p><span>Experience in performance, load, and scalability analysis.</span></p></li><li><p><span>Onboarding into complex applications (reverse engineering).</span></p></li><li><p><span>Excellent communication with both the business side and the development team.</span></p></li><li><p><span>Confidence and the ability to make decisions.</span></p></li><li><p><span>Ability to conduct technical discussions with the client and translate complex topics into simple terms.</span></p></li><li><p><span>High collaborative culture and a strong team‑oriented mindset.</span></p></li><li><p><span>Proactivity and taking ownership of the assigned area.</span></p></li><li><p><span>Ability to work in an international and distributed environment.</span></p></li><li><p><span>Pragmatic problem‑solving approach – focusing on finding solutions rather than over‑complicating issues.</span></p></li><li><p><span>Good work organization and the ability to prioritize tasks and problems.</span></p></li><li><p><span>Openness to feedback and constructive discussion.</span></p></li><li><p><span>Ability to work in an Agile environment (Scrum, SAFe) with a practical attitude toward frameworks, without dogmatic adherence to processes.</span></p></li><li><p><span>Sense of urgency – concentrating on the most important business and technical problems.</span></p></li></ul><h3><strong>Nice to have:</strong></h3><ul><li><p><span>Experienced in using AI tools (Copilot) in day-to-day workflow</span></p></li><li><p><span>Experience with DevExpress OfficeFileApi and Blazor</span></p></li></ul><h3><strong>Project description:</strong></h3><p style="text-align:center;"><span>We are looking for a seasoned .NET professional to join a high‑impact team that maintains a legacy platform while simultaneously building a brand‑new, cloud‑native application. The project is a full‑stack, enterprise‑grade solution that processes large volumes of business documents (PDF, Word) and integrates with a variety of internal and external services.</span></p>

Full TimedirectBackend
PLN 100 - 130/hour2 months ago
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Freelance Backend Developer

Flying Bisons · Remote job

Flying Bisons is a leading Digital Consulting & Delivery company based in the heart of Europe, Warsaw. Our mission is to help our clients to Unleash Digital Potential™. We discover, define, design, and develop world-class digital products that drive business results for our clients, shaping digital experiences for millions of people around the world.We stand out due to our end-to-end process that allows us to approach each and every challenge with confidence that we can deliver the best results. Our expertise includes Research, Digital Strategy, Branding, Content (Written, Photos, Videos), Product Design, Web & Mobile Development, Data Analytics & AI.Join our 120-people team to co-create industry-defining products and heart-racing experiences for the biggest brands (Mercedes AMG, IKEA, KFC, eObuwie, Żabka, Sanofi, Zain) and disruptive startups (like Booksy, Nethone, Telemedi, or DevSkiller)!We're building a curated network of talented freelance Backend Developers that we can call upon for existing and future projects. When you apply to join our freelancer base, you will be evaluated and kept on file. You may not be contacted immediately. When a project matches your specific expertise, you’ll be invited to participate and can choose to accept or decline based on your availability. If you're interested in becoming part of our talent pool, please submit your CV. We’ll get in touch as soon as an opportunity aligned with your skills arises.Are you self-driven, and dependable professional? If so, we look forward to hearing from you!Contract type: B2BWhat skills and experience do we expect?Your Profile & Skills RequiredYou have 2+ years experience in web developmentYou know PHP (including Symfony framework) & SQLYou have experience in developing RESTFull APIsYou have a good understanding of business and technologyYou know the basics of Docker & GitYou can optimize the applicationYou want to learn and develop by implementing challenging and ambitious projectsYou communicate in English (B2+ level) and PolishNice to HavesExperience in Sulu CMS or Sylius frameworkPHPUnit, Behat, PHPSpecExperience in working with the cloud environmentCI / CD experienceDomain-Driven Design and CQRS

Full TimeRemotedirectBackend
Salary not disclosed6 months ago
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WORKAI® introduces AI for Work — the AI-native approach to Employee ExperienceLEARN MORELooking for new challenges or just tired of a boring software house reality? Let us show you what can we achieve together!Customer support consisting of handling platform maintenance requests (i.e. bug fixes, technical support) from end users,Performing analyses, maintaining communication with clients, identifying issues, implementing solutions, and delivering changes,Developing and maintaining WORKAI® platform applications using .NET and .NET Core frameworks,Participating in the preparation and release process of application versions, as well as deploying them to client environments (afternoon and evening hours as needed),Designing scalable applications using cloud-based solutions,Collaborating internally with other departments (First Line Support, Product, QA) to ensure timely and efficient completion of assigned implementation tasks and client requests,Performing basic tests and verification of delivered solutions and implemented changes.Minimum 4+ years of commercial experience in building scalable web applications,Proficiency in .NET Framework, ASP.NET MVC, Web API 2, Transact-SQL, Entity Framework, REST, and OData,Knowledge of Microsoft Azure services such as Azure App Services, Azure Functions, Cosmos DB, Azure Search, Azure Service Bus, and Azure SQL,Familiarity and experience in developing SaaS applications,Understanding and ability to apply best design patterns and practices,Strong analytical thinking skills, including the ability to assess facts and draw conclusions to propose optimal solutions,Willingness to perform duties in the afternoon and evening hours, depending on current needs,Proficiency in English (spoken and written) at B2 level,Excellent communication skills,Ability to work effectively as part of a team,Fluent communication skills in Polish (in the case of foreign candidates).Openness to client interaction, with a strong focus on understanding their needs and problems,Experience in a similar role such as Developer or Service/Support Engineer,Experience in building portals on CMS platforms (e.g., Umbraco, SharePoint, Sitecore, AEM, Orchard Core,Ability to design and implement scalable APIs,Familiarity with Azure DevOps and JIRA,Knowledge of JavaScript frameworks such as Angular, Vue, or React.Working with the latest Microsoft cloud tools and technologies,Flexible form of cooperation (hybrid, on-site),Multidirectional development,Certificates and knowledge transfer,Full workplace equipment,Benefit package (including Medicover medical care, Multisport sports card, fruit Tuesdays, integration meetings and others).

Full TimedirectBackend
Salary not disclosed1 month ago
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Junior/Mid Java Developer

7N Sp. z o.o. · Poland

Published: 6 days ago Location: Warsaw, Poland Remuneration: 15 120 - 18 480 PLN (90 - 110 PLN/h) + VAT Share via e-mail Wages may vary depending on experience and qualifications of a given candidate Zadania Implementacja nowoczesnych rozwiązań w sektorze ubezpieczeniowym, Budowa i rozbudowa systemów w rozproszonej architekturze mikrousługowej dla systemów zgłaszania i obsługi szkód Usprawnianie obsługi wybranych procesów biznesowych Zapewnienie właściwej jakości wytwarzanego oprogramowania dzięki rozwijaniu piramidy testów automatycznych Wykonywanie i odbieranie code review Udział w wydarzeniach scrumowych zwinnego zespołu Codzienna współpraca w zgranym zespole chętnie dzielącym się wiedzą i zorientowanych na wytwarzanie kodu wysokiej jakości w niebanalnych rozwiązaniach Oczekiwania Minimum 3 lata doświadczenia na stanowisku Java Developera Dobra znajomość Spring, Hibernate, Spring Boot i Spring Cloud Dobra znajomość języka SQL (preferowane Oracle lub PostgreSQL) Znajomość narzędzi: git, maven Znajomość frameworków do pisania testów jednostkowych Znajomość paradygmatów Functional Programing i Object Oriented Programing Mile widziana znajomość następującyh technologii: Docker, K8S, helm, Kafka, Rabbit MQ, ElasticSearch Oferujemy Stałe wsparcie osobistego agenta , dbającego o Twoją ciągłość projektową, kontakt z klientem, niezbędne formalności, komfort pracy oraz rozwój, Consultant Development Program – doradztwo w planowaniu rozwoju w oparciu o najnowsze trendy i potrzeby rynku IT, obejmujące m.in. konsultacje z agentami i mentorami rozwoju , Dostęp do 7N Learning & Development – platformy rozwojowo-edukacyjnej z webinarami, biblioteką artykułów i raportów branżowych oraz regularnymi zaproszeniami na jednorazowe i cykliczne wydarzenia rozwojowe – techniczne, biznesowe oraz life-stylowe, Spektakularne eventy integracyjne , zarówno dla Ciebie (np . coroczny wyjazd Kick-Off , imprezy świąteczne czy sportowe Letnie Igrzyska), jak i dla Twoich bliskich (np. pikniki rodzinne), Rozwój zawodowy nie tylko podczas projektu – możesz zaangażować się w przekazywanie wiedzy innym w ramach oferty 7N Services kierowanej do klientów 7N, Relacje i dostęp do wiedzy n ajbardziej doświadczonych ekspertów IT na rynku – średni staż zawodowy naszego Konsultanta w Polsce to ponad 10 lat, Pakiet benefitów zaplanowany od A do Z , czyli dofinansowanie do opieki medycznej, ubezpieczenia na życie, karty sportowej dla Ciebie i Twoich bliskich, a także zniżki do sklepów w Polsce i za granicą. O 7N Ciągłe poszukiwanie projektów, trudne negocjacje stawek, brak wsparcia w rozwoju – brzmi znajomo? W 7N zyskujesz nie tylko stabilność kontraktów, ale też zaangażowanie osobistego opiekuna dbającego o Twój komfort zawodowy i stały dostęp do inicjatyw rozwojowych. Naszym celem jest zapewnienie Ci stabilnej i komfortowej współpracy, która przyczyni się do sukcesu Twojego jako eksperta IT oraz naszych klientów. Budujemy trwałe relacje, bazując na skandynawskich wartościach i 30-letnim doświadczeniu w tworzeniu rozwiązań IT dla ponad 200 organizacji. Person responsible for this recruitment process: Hi! I'm Anna Knyzio Recruitment Specialist +48 728 901 078 Warsaw, Poland

Full TimedirectBackend
PLN 18,480 - 18,480/month4 months ago
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Java Developer

gravity9 · Remote job

Join Our Growing Team - Future Opportunities Await!We are excited to share that our company is experiencing significant growth and expansion, and as a result, we're on the lookout for talented individuals to join our team.We want to be upfront about our hiring process. At this moment, we are in the process of securing projects that align with our business goals and objectives. Our intention is to ensure that once we bring new team members on board, they will have a meaningful and impactful role to play from day one. While we might not be able to extend an offer immediately, we are highly interested in considering you for these future projects.If you're open to the idea of potentially joining our team in the future, we encourage you to continue with our interview process. We value your time and effort and believe that getting to know you better will help us make an informed decision.Once you have effectively concluded the entire recruitment procedure, we will retain your profile and reach out to you once a suitable opportunity emerges. Additional interviews will not be necessary at this stage, and we anticipate being able to extend an offer to you promptly.What does the recruitment process look like?1. Recruiter ScreenIn the first call, our recruiter will learn more about you and your story to check a potential fit for gravity9. This is also an opportunity to ask your questions about the role and company. This step might take around 60 mins.2. Tech 1 Interview with our software consultantsIn this meeting your potential future teammate will take a deeper dive into your experience and what you could bring to the team.This step will take around 90 mins.3. Tech 2 Interview with our tech leadsIn this meeting your potential future teammate will take a deeper dive into your experience and what you could bring to the team.This step will take around 90 mins.4. Final InterviewYou made it to the very last stage! Here we already strive to cooperate with you and give you an opportunity to meet our leadership team during this informal talk. This step will take around 30 mins.The salary details for the role will be communicated ahead of the first recruitment meeting.Role DescriptionWe are looking for a smart, enthusiastic backend software engineer with experience in MongoDB and a keen interest in current technology and engineering. Using your knowledge of Java and MongoDB, and engineering best practices, you will be involved in helping clients to adopt the latest version of MongoDB across a suite of their application. You will take an active lead in team discussions and code reviews and work collaboratively with your colleagues to identify, prioritise and deliver features which bring value to our clients. You will also guide less experienced developers.We believe small, multi-disciplinary teams are most effective in delivering complex change. As such, we are looking for someone with a collaborative mindset who is happy to be flexible and take on different responsibilities over the lifetime of our projects. Role requirements - technical skills and experienceThis role will suit a highly capable developer with extended working experience with Java, Node.js AND/OR Python and MongoDB (or any other NoSQL database).Must-Have: Excellent command / highly proficient in spoken and written English (working directly with UK/US-based clients) Expert in Java 8+ and ideally having Java 11/14/17 and OpenJDK experienceCommercial experience with Node.js AND/OR Python is requiredThis role requires a willingness to upskill in additional technologies, including Node.js AND/OR PythonHands-on experience with MongoDB or other NoSQL DB, including data modeling in NoSQL databasesThorough understanding of Spring, especially Spring Boot, Spring Framework, Spring DataExperience working with Azure or AWSUnderstanding of Synch and Async communication (REST-based, Queue and/or Topic based (depending on technology)Proficiency in working with Microservice ArchitectureIncluding containerization, high availability, and failover scenariosExperience writing unit and integration tests.Experience in working with Docker and containerized applicationsExperience in Maven/Gradle and working with CI/CD pipelinesNice-to-Have:AI integrationAWS Professional CertificationsRole requirements – soft skillsKey attributes and behaviours to succeed in this role will be:Ability to understand business requirements and translate them into technical requirementsCustomer Focus – passion for understanding the problem we are trying to solve with software and to advocate solutions to your client.Delivery focus - strong analysis and problem-solving skills. Ability to evaluate, design and implement effective solutions. Flexibility to adapt skills to a spectrum of client engagements, use cases and modes of change delivery.Exemplary standards of personal integrity and respect for others – professional approach to all aspects of client engagement and collaborative team working, able to quickly build relationships based on trust and transparency. Strong presentation and written and verbal communication are essential given the client facing nature of the role.Value driven - Creative thinking, with aptitude for innovation and strong desire to exceed client expectations.Energy – positive attitude and determination to learn and succeed.

Full TimeRemotedirectBackend
Salary not disclosed1 month ago
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Java Developer

B2B Network · Poland

The STP Lending Manager application is a brand‑new greenfield initiative, offering a rare opportunity to shape a system from the ground up. The project is in its early stages and is backed by a dedicated and highly engaged business team, ensuring short feedback loops and clear, well‑prioritised requirements.   This is a pure backend role, focused on building a robust and scalable Java platform using Spring Boot. The solution will integrate with multiple surrounding systems through REST APIs and Kafka‑based event streaming, playing a central role in the wider lending ecosystem. JPA is used for persistence, with a strong emphasis on clean architecture, maintainable code, and clear ownership.   We expect team members to be comfortable leveraging AI‑assisted development tools, such as GitHub Copilot, to improve productivity, code quality, and flow efficiency in day‑to‑day development.   The team works in an Agile setup, characterised by high levels of collaboration, transparency, and continuous improvement. English is the primary working language, and communication is a key success factor. Developers work closely with Business SMEs and the Product Owner, enabling fast clarification, shared understanding, and genuinely collaborative solution design rather than “over‑the‑wall” delivery.   This role suits someone who enjoys building systems from scratch, working close to the business, and influencing both technical and solution-level decisions in a modern backend environment.   Must-have knowledge and experience Java 21+ Spring boot JPA MavenLiquibase for database change versioning Nice-to-have knowledge and experience Cucumber for testing

Full TimedirectBackend
Salary not disclosed4 months ago
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Senior Java Developer

B2Bnetwork · Poland

Detailed description of work task to be carried out Senior Java Developer working with Credit Data Sourcing domain.   The role focuses on: Development and maintenance of backend services handling credit data Strong involvement in data flows, integrations, and business logic Close cooperation with Business Analysts, Product Owners, and stakeholders Participation in production support and incident resolution   Key Responsibilities: Design, develop, and maintain Java-based microservices Implement and optimize data flows and integrations between systems Collaborate with analysts on: user stories, acceptance criteria, solution design Translate business requirements into scalable technical solutions Support incident analysis and troubleshooting (logs, root cause analysis) Contribute to refinement sessions and technical design discussions Ensure high-quality code, testing, and performance Ways of Working Agile / Scrum team environment Close collaboration with: Business Analysts (who define requirements and user stories), Product Owner and stakeholdersActive participation in: refinement, daily work, release coordination (team aligns regularly around releases) Must-have knowledge and experience: Domain & Functional Expectations• Experience in:o data flows / data sourcing systemso integration-heavy environments • Ability to:o understand end-to-end data flow across systemso analyze impact of changes on upstream/downstream systems• Experience in financial/credit domain is a strong advantageKey differentiator:Developer must understand how data flows through the systems, not only implement services.• This is NOT a pure coding role• Candidates must:o understand business context and data flowso be able to work closely with analysts and refine requirements• Profiles focused only on “feature coding” without system understanding may not fitSoft Skills / Seniority Expectations• Ability to challenge and clarify requirements• Strong analytical and problem-solving skills• Ownership mindset – takes responsibility for delivery• Good communication with both technical and business stakeholders• Comfortable working in complex, distributed systems Nice-to-have knowledge and experience • Experience with:o frontend Angular or React frameworko credit risk / banking systemso event-driven architectureso performance tuning in data-heavy systems

Full TimedirectBackend
Salary not disclosed2 months ago
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Lead Java Developer/Architect

gravity9 · Remote job

gravity9 is a boutique IT consulting company headquartered in the UK with offices in the US, Canada, Poland, Ireland, and Colombia. Our team has deep experience in engineering, experience design and product management. We enjoy a challenge and pride ourselves on working with our clients on their most complex problems, finding elegant and flexible solutions that help them transform their businesses.Join Our Growing Team - Future Opportunities Await!We are excited to share that our company is experiencing significant growth and expansion, and as a result, we're on the lookout for talented individuals to join our team.We want to be upfront about our hiring process. At this moment, we are in the process of securing projects that align with our business goals and objectives. Our intention is to ensure that once we bring new team members on board, they will have a meaningful and impactful role to play from day one. While we might not be able to extend an offer immediately, we are highly interested in considering you for these future projects.If you're open to the idea of potentially joining our team in the future, we encourage you to continue with our interview process. We value your time and effort and believe that getting to know you better will help us make an informed decision.Once you have effectively concluded the entire recruitment procedure, we will retain your profile and reach out to you once a suitable opportunity emerges. Additional interviews will not be necessary at this stage, and we anticipate being able to extend an offer to you promptly.What does the recruitment process look like?Recruiter ScreenIn the first call, our recruiter will learn more about you and your story to check a potential fit for gravity9. This is also an opportunity to ask your questions about the role and company. This step might take around 60 mins.2. Tech 1 Interview with our software consultantsIn this meeting your potential future teammate will take a deeper dive into your experience and what you could bring to the team.This step will take around 90 mins.3. Tech 2 Interview with our tech leadsIn this meeting your potential future teammate will take a deeper dive into your experience and what you could bring to the team.This step will take around 90 mins.4. Final InterviewYou made it to the very last stage! Here we already strive to cooperate with you and give you an opportunity to meet our leadership team during this informal talk. This step will take around 30 mins.Role DescriptionWe are in search of an individual capable of spearheading interactions with our clients. This position entails serving as the primary contact with the accountability for delivery, fostering client relationships, and supervising the team responsible for the tasks. The responsibilities also include technical leadership, getting your hands dirty with code, and effective stakeholder management through close collaboration with clients. Throughout the engagement, the role requires working closely with the client's internal staff and product teams, serving as their strategic delivery partner and trusted advisor.We believe small, multi-disciplinary teams are most effective in delivering complex change of this nature. As such, this is a crucial role and will require flexibility and the ability to take on different responsibilities over the lifetime of the engagement. Key responsibilities for the role include:Interaction with stakeholders, ensuring expectations are managed and business goals are understoodAccountable for the design of the solutionsOverseeing and managing development teamsAt least 50% hands-on coding in Java, Node.js, OR PythonOccasional business travel in North America Role requirements - technical skills and experienceThis position is well-suited for a seasoned Technical Lead with a background in leading client-facing engagements. Must-have requirements:Experience in designing and building custom medium/large AND/OR enterprise applications for external clientsExpert in JavaExperience in AWSExperience in MongoDB OR another NoSQL databsesExperience in microservices architectureExperience in Python AND/OR Node.jsTeam leading and overseeing delivery of a few distributed teams Nice-to-have requirements:Experience in Data MigrationsExperience in Kafka (or similar technology)AWS Professional CertificationsRole requirements - soft skillsKey attributes and behaviours to succeed in this role will be:Delivery focus - strong analysis and problem-solving skills. Ability to evaluate, design and implement effective solutions. Flexibility to adapt skills to a spectrum of client engagements, use cases and modes of change deliveryStrong consultant - good at listening and asking questions. Ability to see issues from different perspectives and communicate wellExemplary standards of personal integrity and respect for others – professional approach to all aspects of client engagement and collaborative team working, able to quickly build relationships based on trust and transparency. Strong presentation and written and verbal communication are essential given the client facing nature of the roleValue driven - Creative thinking, with aptitude for innovation and strong desire to exceed client expectationsEnergy – positive attitude and determination to learn and succeed

Full TimeRemotedirectBackend
Salary not disclosed1 month ago
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Join Tether and Shape the Future of Digital FinanceAt Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.Innovate with TetherTether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.But that’s just the beginning:Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.Why Join Us?Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.Are you ready to be part of the future?About the jobIn this pivotal role, you will leverage your expertise to build robust, scalable, and secure backend solutions that contribute to Tether’s mission of pioneering a decentralized future in digital finance. This is an opportunity to take on formidable challenges and make a significant impact on our cutting-edge, global platform.ResponsibilitiesInnovative Solutions: Contribute to the creation of groundbreaking projects, utilizing agile methodologies and innovative technologies to create incredible platforms.Scalability: Ensure backend services remain effortlessly responsive and real-time, accommodating the platform's continual growth and evolving user base.Security: Uphold the highest security standards in all backend processes and services to safeguard our users' assets and data. Node/JavaScript Expertise: Very proficient in Node.js and JavaScript programming.Microservices Architecture: Familiarity with microservices architecture for scalable applications.Complex Platform Development: Experience in actively developing complex platforms.Peer-to-Peer Technologies: Understanding of Peer-to-Peer technologies.Database Interaction: Proficiency in interacting with databases such as MySQL and MongoDB.Quick Learner: Ability to quickly adapt and learn new technologies.Security Awareness: Strong understanding and experience implementing best security practices.Important information for candidatesRecruitment scams have become increasingly common. To protect yourself, please keep the following in mind when applying for roles:Apply only through our official channels. We do not use third-party platforms or agencies for recruitment unless clearly stated. All open roles are listed on our official careers page: https://tether.recruitee.com/Verify the recruiter’s identity. All our recruiters have verified LinkedIn profiles. If you’re unsure, you can confirm their identity by checking their profile or contacting us through our website.Be cautious of unusual communication methods. We do not conduct interviews over WhatsApp, Telegram, or SMS. All communication is done through official company emails and platforms.Double-check email addresses. All communication from us will come from emails ending in @tether.to or @tether.ioWe will never request payment or financial details. If someone asks for personal financial information or payment at any point during the hiring process, it is a scam. Please report it immediately.When in doubt, feel free to reach out through our official website.

Full TimeRemotedirectBackend
Salary not disclosed5 months ago
?%?% → zaloguj się i wgraj CV — tutaj pojawi się TWÓJ wynik dopasowania do tej oferty

Join Tether and Shape the Future of Digital FinanceAt Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.Innovate with TetherTether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.But that’s just the beginning:Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.Why Join Us?Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.Are you ready to be part of the future?About the jobAs a senior Backend Developer, you will be a part of the team that works on the development and maintenance of the backend components of multiple services related to the platform. This includes:New Products and Features - Tether continuously strives to create innovative new features in order to provide the most professional experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry.Scalability - all backend services that power Tether platform must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth.Security - Tether makes Security its most important feature. The Backend Development team is responsible for building all the API services and backend processes with the highest security principles and standard, in order to protect the safety of the entire user base.ResponsibilitiesWork closely with developers, product managers, designers, and other stakeholders to translate requirements into clear, practical architectures.Improve existing core backend services written in NodeJSImplement new solutions that interact with different core services through RPC callsWrite complex database queries for compliance and financial purposes At least 5 years of experience working with Javascript/Nodejs.Familiar with microservices architectureHave actively participated in the development of a complex platformGood experience in interacting with databases (MySQL, MongoDB)Ability to quickly learn new technologiesGood understanding of security practicesPreferred skills:Experience with blockchain integrationComfortable with high-availability conceptsRuby and Rails experienceOther technologies of interest: Message queues (Redis), Caches and Job QueuesImportant information for candidatesRecruitment scams have become increasingly common. To protect yourself, please keep the following in mind when applying for roles:Apply only through our official channels. We do not use third-party platforms or agencies for recruitment unless clearly stated. All open roles are listed on our official careers page: https://tether.recruitee.com/Verify the recruiter’s identity. All our recruiters have verified LinkedIn profiles. If you’re unsure, you can confirm their identity by checking their profile or contacting us through our website.Be cautious of unusual communication methods. We do not conduct interviews over WhatsApp, Telegram, or SMS. All communication is done through official company emails and platforms.Double-check email addresses. All communication from us will come from emails ending in @tether.to or @tether.ioWe will never request payment or financial details. If someone asks for personal financial information or payment at any point during the hiring process, it is a scam. Please report it immediately.When in doubt, feel free to reach out through our official website.

Full TimeRemotedirectBackend
Salary not disclosed5 months ago
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Senior Backend Developer

Tether Operations · Remote job

Join Tether and Shape the Future of Digital FinanceAt Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.Innovate with TetherTether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.But that’s just the beginning:Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.Why Join Us?Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.Are you ready to be part of the future?About the jobAs a senior Backend Developer, you will be a part of the team that works on the development and maintenance of the backend components of multiple services related to the platform. This includes:New Products and Features - Tether continuously strives to create innovative new features in order to provide the most professional experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry.Scalability - all backend services that power Tether platform must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth.Security - Tether makes Security its most important feature. The Backend Development team is responsible for building all the API services and backend processes with the highest security principles and standard, in order to protect the safety of the entire user base.ResponsibilitiesWork closely with developers, product managers, designers, and other stakeholders to translate requirements into clear, practical architectures.Improve existing core backend services written in NodeJSImplement new solutions that interact with different core services through RPC callsWrite complex database queries for compliance and financial purposes At least 5 years of experience working with Javascript/Nodejs.Familiar with microservices architectureHave actively participated in the development of a complex platformGood experience in interacting with databases (MySQL, MongoDB)Ability to quickly learn new technologiesGood understanding of security practicesPreferred skills:Experience with blockchain integrationComfortable with high-availability conceptsRuby on Rails experienceOther technologies of interest: Message queues (Redis), Caches and Job QueuesImportant information for candidatesRecruitment scams have become increasingly common. To protect yourself, please keep the following in mind when applying for roles:Apply only through our official channels. We do not use third-party platforms or agencies for recruitment unless clearly stated. All open roles are listed on our official careers page: https://tether.recruitee.com/Verify the recruiter’s identity. All our recruiters have verified LinkedIn profiles. If you’re unsure, you can confirm their identity by checking their profile or contacting us through our website.Be cautious of unusual communication methods. We do not conduct interviews over WhatsApp, Telegram, or SMS. All communication is done through official company emails and platforms.Double-check email addresses. All communication from us will come from emails ending in @tether.to or @tether.ioWe will never request payment or financial details. If someone asks for personal financial information or payment at any point during the hiring process, it is a scam. Please report it immediately.When in doubt, feel free to reach out through our official website.

Full TimeRemotedirectBackend
Salary not disclosed5 months ago
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Senior Java Developer

B2B Network · Poland

Full TimedirectBackend
Salary not disclosed1 month ago
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Java Developer

Codest Ltd. Company No. 12590542, VAT number: GB363431020 · Kraków, Małopolskie, Poland

🌍 Hello World!We are The Codest -  International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services.Our expertise centers on web development, cloud engineering, DevOps and quality.  After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams. But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step.💡Project Description:In this role, you’ll develop and maintain Java-based services and REST APIs, collaborate closely with cross-functional teams, and contribute to system architecture with a strong focus on reliability, security, and code quality. You’ll also take part in the full software development lifecycle, including CI/CD processes, automated testing, code reviews, and production support.Please note: this is a hybrid position, you will be expected to come into the office 6-8 days per month overall (the office is located in Kraków). 📈 Your Responsibilities:Develop and maintain Java backend services, REST APIs, and microservicesCollaborate with cross-functional teams to deliver scalable solutionsSupport production systems, resolve incidents, and troubleshoot issuesContribute to system architecture focused on performance and reliabilityWork in Agile teams using CI/CD, automated testing, and code reviewsMaintain technical documentation and improve engineering practicesAct as a technical SME for application and support-related topicsIdentify and manage risks, dependencies, and delivery blockers🔑 Key Requirements:Advanced English in speaking and writing Strong commercial experience with Java (8+/11+/17+/21) and Spring BootHands-on experience with REST APIs, microservices, and SQL databases (PostgreSQL, Oracle)Familiarity with React, MQ/Solace, Redis, and KubernetesExperience with CI/CD, Git, Maven/Gradle, and DevOps toolingKnowledge of monitoring and observability tools (Grafana, Splunk, Prometheus, Jenkins, etc.)Understanding of application security and testing practicesExperience working in Agile / DevOps environmentsStrong communication skills and ability to work across distributed teamsSelf-driven, customer-oriented, and comfortable owning tasks end-to-end📜 Our Promise (what you can expect from us):17-22k PLN on B2B300 PLN to use on our benefits platform, Worksmile - gift cards, medical services, sports, etc.Our B2B contract contains provisions that allow you to obtain IP BOX supportIntegration events, education opportunities and much more…A unique opportunity to take your career to the next level - we’re looking for people who want to create an impact. You have ideas, we want to hear them!📌 Recruitment process:30 minute screening call online with our recruiter1 hour screening call online with our developer1 hour technical call with the client30 minute call with the team leaderOfferQuestions, insights? Feel free to reach out to our recruiting team:ewa.szczodrak@thecodest.coIn the meantime, feel free to visit our website where you can find key facts about us.

Full TimedirectBackend
PLN 300 - 300/hour2 weeks ago
PoprzedniaStrona 2 z 13Następna