Oferty pracy Backend Developer — 176+ Ofert

Principal Developers needed to join a new company working in the Health Tech scene. Due to its expertise, this team is the reason this company is transferring its engineering capabilities from the US straight here to BelfastYour role:Covid has done nothing to stop this engineering team, as they have been ramping up production working on new products, architecting new data layers and re-architecting previous workYou will be a key member of the team, working in 2-week sprints going straight to productionYou will contribute to a team driven environment to develop, enhance and maintain components within a micro-services SaaS architectureYou will be working both on existing and brand-new products, yet to hit the marketYour skill set:Full-Stack experience with a strong focus on Java and Angular/ReactPrevious experience as a Full-Stack dev with outstanding communication skills, with the ambition to be part of a team who are growing exponentiallyAbility to ensure software meets standard requirementsAbility to mentor younger team membersWhy join?Proper engineering with a future focused companyChance to become Salesforce AND AWS certifiedWork with one of NI's most prolific tech leadersBetter than market salaries*This company is always keen to hear from amazing developers, whether you are 80% Java and 20% JavaScript or the opposite, you will get the chance to use a wide variety of tech* Next Steps:Please submit your application or speak to a specialist consultant from the Abacus team on 0044 (0) 28 9031 3157 for a confidential discussion. We aim to respond to all inquiries within 4 business hours.The team at Abacus manages a range of permanent and contract positions throughout Northern Ireland, the UK and the Republic of Ireland. If you are professionally qualified we can support your job search.Terms and Conditions and Privacy Policy on www.abacus.careers

Backend Developer / Senior Backend Developer Liverpool (Hybrid, 2–3 days onsite) Join a high-performing engineering team that has transformed how this company builds software. Two years ago, they brought development in-house. Since then, they’ve delivered faster, cleaner, and smarter systems that have reshaped the business. They’re now growing again and hiring for both mid-level and senior backend developers. You’ll work on large-scale, event-driven systems built on .NET 8, Azure, and microservices architecture. You’ll have the chance to own projects, solve complex challenges, and make a visible impact. In this role, you’ll: Develop and maintain scalable backend systems using .NET 8, .NET Core, and C# Design and implement Azure microservices for fast, reliable systems Build reusable internal libraries to improve development speed and consistency Work with large datasets using Cosmos DB, MongoDB, MySQL, and SQL Server You’ll enjoy: Salary up to £75,000 depending on experience Annual bonus and enhanced leave Hybrid setup, 2–3 days in the Liverpool office Paid maternity and paternity leave Unlimited access to mental health professionals This is your chance to join a forward-looking team where your work shapes real products. You’ll be trusted to own delivery, make decisions, and see your ideas come to life. Apply now and show us what you’d bring to the team.

Senior Ruby on Rails Engineer Fulham (2/3 days on-site) £60,000 - £80,000 + Private Healthcare & Benefits This is an excellent opportunity for a Mid-to-Senior Ruby on Rails Engineer to join a start-up in a role where you will play a major part in future developments. This company is a Series A startup, breaking down barriers and making the world more accessible for everyone. Originally founded within the UK transport sector, they have developed award-winning, innovative solutions that prioritise dignity, safety, and inclusion for millions of users. In this varied role, you will move beyond feature development to focus on the stability, performance, and observability of the core Rails ecosystem. You will act as a trusted backend partner for Product and Platform teams, stabilising third-party integrations, improving background job efficiency, and utilising architectural documentation like C4 models to ensure long-term scalability. The ideal candidate will be a seasoned Ruby on Rails developer with deep expertise in PostgreSQL and background processing via Sidekiq and Redis. You should be highly proficient in building RESTful APIs, managing JSON serialisation, and implementing secure authentication methods like JWT or SSO. Beyond coding, you will possess knowledge of Docker and AWS, alongside the communication skills required to translate complex technical risks into clear operational priorities. This is a fantastic opportunity to join a purpose-led business during a period of international scaling. You will have the autonomy to own multiple backend systems, reduce operational risk across global integrations, and play a pivotal role in shaping the architectural future of a platform recognised for its excellence in accessibility and safety. The Role: Lead the evolution of core Ruby on Rails operational platforms. Optimise PostgreSQL performance and Sidekiq background job efficiency. Manage secure third-party integrations and RESTful API design. Partner with Platform teams on AWS and CI/CD reliability. The Person: Deep experience with Ruby on Rails and OOP. Expert in PostgreSQL tuning and complex query optimisation. Proficient with Docker, AWS, and containerised deployment workflows. Strong communicator, capable of leading production incident responses. Reference Number: BBBH271314 Rise Technical Recruitment Ltd acts an employment agency for permanent roles and an employment business for temporary roles. The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set and will be decided by our client, the employer. Rise are not responsible or liable for any hiring decisions made by the end client. We are an equal opportunities company and welcome applications from all suitable candidates.

<p><strong>Senior .NET Developer</strong></p> <p> </p> <p>Pearson Carter are currently working with a professional organisation who are expanding their development team due to an increase of internal projects</p> <p> </p> <p>They offer a base salary of £55,000 &#8211; £66,000</p> <p> </p> <p>Get in touch if you are looking for your next opportunity!</p> <p> </p> <p><strong>Responsibilities:</strong></p> <ul> <li>Design and develop applications in .NET</li> <li>CI/CD activity including building pipelines and working closely with deployment process</li> <li>Support and mentor junior devs</li> </ul> <p> </p> <p><strong>Experience:</strong></p> <ul> <li>C#.NET</li> <li>.NET Core</li> <li>Azure DevOps, Ci/CD pipelines</li> <li>Deployment experience</li> <li>Working to a Agile Methodology</li> </ul> <p> </p> <p><strong>Salary</strong></p> <p>They offer an excellent salary: £55,000 &#8211; £66,000</p> <p> </p> <p><strong>Location</strong></p> <p>This client has an office in Sheffield however they’re offering 3 days from home per week.</p> <p> </p> <p>Applications are welcome from professionals with Development experience.</p> <p> </p> <p><strong>How to Apply</strong></p> <p>Please apply asap with your CV to be considered for this position. You can also get in touch with me on matthew@pearsoncarter.com or 0191 406 6111.</p> <p> </p> <p>Pearson Carter is the Global Leader in IT Recruitment with specialist roles across the globe &#8211; <a href="https://www.pearsoncarter.com/">www.pearsoncarter.com</a></p>

We are partnering with a high-growth technology start-up, that is redefining the rules of music production. Backed by a top-tier European VC and several iconic Silicon Valley tech pioneers, they have reached significant scale—surpassing 1 million user-generated assets within months of their initial launch.As a core member of the founding engineering team, you will be responsible for maturing and leading the core platform as it scales from its successful pilot phase to millions of global users.🚩More about you:We are looking for a brilliant, passionate engineer—likely with around 4-6 years of hands-on experience—who is ready to step out of a siloed role and into a position of true ownership.You’ve mastered the basics; now it’s time to apply them at a scale most engineers only see at much larger firms.📈Your Impact &amp; Growth PathOwn the Migration: You’ll lead our transition from a pilot database to a high-performance relational schema. This is a rare chance to own a migration end-to-end—a "gold star" project for any engineer's career.Master Complex Systems: You will solve the high-stakes problems of global commerce, building a "bulletproof" payments and subscription engine that manages revenue for millions of users.Creative Engineering: You’ll tackle the hard (but fun &amp; interesting) stuff. Your code will be the reason a creator halfway across the world can make music in real-time.Build the Culture: As a founding team member, you’ll help set the standards. From CI/CD workflows to observability, you are helping build the "how we work" playbook from the ground up.⚙️Technical Skillset:Node.js/TypeScript ecosystemSolid Database Experience, leading their upcoming database migrationSystems Engineer: You have a natural instinct for identifying failure modes and optimizing performanceFounding Mindset: You thrive in a "ship-fast" environment. You value high autonomy and the opportunity to work in a high-intensity, in-person collaborative studio.📌The SetupLocation: Central London (Fully on-site).Package: Significant founding-team equity Competitive salary.Culture: A low-ego, talent-dense team building a product with massive global engagement.Benefits: Premium health coverage, gym membership, and on-site meal options.If this sounds like an interesting challenge - apply and let's talk 😊

Join us as a Backend Engineer in the Chief Technology Office at Barclays where you’ll be developing cutting-edge AI platforms using state-of-the-art technologies. As part of our Chief Technology Office, you’ll work on implementing the latest AI/ML solutions for our bank. In this role, you'll collaborate with talented engineers to design and implement high-performance backend systems that enhance our AI platforms, driving industry best practices while contributing to Barclays' commitment to embracing AI to make Barclays simpler, better, and more balanced.To be successful as a Backend Engineer, you should have experience with:Ample technical skills in backend development using Python.Proven AWS implementation experience.Proficiency with software development lifecycle using, Git, Agile, and automated testing.Demonstrable experience with Docker/Kubernetes containerisation and CI/CD pipelines.Some other highly valued skills may include:Hands-on, curious Engineer with good collaborative skills.Infrastructure as code knowledge (terraform, CloudFormation).Experience developing or integrating AI/ML frameworks, e.g. LangChain.Bachelors in Computer Science, related fields, or equivalent experience.You may be assessed on the key critical skills relevant for success in role, such as risk and controls, change and transformation, business acumen strategic thinking and digital and technology, as well as job-specific technical skills.This role will be based in either our Knutsford or Glasgow office. Purpose of the roleTo design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues. AccountabilitiesDevelopment and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance.Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives.Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing.Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth.Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions.Implementation of effective unit testing practices to ensure proper code design, readability, and reliability.Assistant Vice President ExpectationsTo advise and influence decision making, contribute to policy development and take responsibility for operational effectiveness. Collaborate closely with other functions/ business divisions.Lead a team performing complex tasks, using well developed professional knowledge and skills to deliver on work that impacts the whole business function. Set objectives and coach employees in pursuit of those objectives, appraisal of performance relative to objectives and determination of reward outcomesIf the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others.OR for an individual contributor, they will lead collaborative assignments and guide team members through structured assignments, identify the need for the inclusion of other areas of specialisation to complete assignments. They will identify new directions for assignments and/ or projects, identifying a combination of cross functional methodologies or practices to meet required outcomes.Consult on complex issues; providing advice to People Leaders to support the resolution of escalated issues.Identify ways to mitigate risk and developing new policies/procedures in support of the control and governance agenda.Take ownership for managing risk and strengthening controls in relation to the work done.Perform work that is closely related to that of other areas, which requires understanding of how areas coordinate and contribute to the achievement of the objectives of the organisation sub-function.Collaborate with other areas of work, for business aligned support areas to keep up to speed with business activity and the business strategy.Engage in complex analysis of data from multiple sources of information, internal and external sources such as procedures and practises (in other areas, teams, companies, etc).to solve problems creatively and effectively.Communicate complex information. 'Complex' information could include sensitive information or information that is difficult to communicate because of its content or its audience.Influence or convince stakeholders to achieve outcomes.All colleagues will be expected to demonstrate the Barclays Values of Respect, Integrity, Service, Excellence and Stewardship – our moral compass, helping us do what we believe is right. They will also be expected to demonstrate the Barclays Mindset – to Empower, Challenge and Drive – the operating manual for how we behave.

Backend Engineer Salary: Up to £75k (DoE) * Hybrid: 1 day/week in London * No sponsorship offered I'm recruiting on behalf of a fast‑growing accounting‑tech startup that builds automation and AI tools for in‑house finance teams. The company has strong traction and is expanding its engineering team. Role OverviewDevelop and maintain backend services powering automation featuresWork closely with product and leadership in a fast‑paced startup environmentRapidly prototype ideas and help scale them into reliable production systemsOccasionally contribute small frontend updates (React/TypeScript) Tech RequirementsMust have: Java or Kotlin, Spring BootMySQL, OpenSearch, AWSNice to have: Groovy, Ruby on Rails, React/TypeScript Candidate ProfileSeveral years' backend engineering experiencePrior startup experience strongly preferredStrong problem‑solving mindsetComfortable working independently and collaborativelyMust already have the right to work in the UK (no sponsorship) BenefitsShare options25 days holiday + bank holidaysPersonal learning & development budgetHigh‑impact role in a small, scaling team Services advertised by Gold Group are those of an Agency and/or an Employment Business.We will contact you within the next 14 days if you are selected for interview. For a copy of our privacy policy please visit our website.

We’re seeking two more Back End PHP Developers for this Digital Agency in Central London. With over 25 people, and growing faster than ever, come along for the journey to help shape your career. PHP Developer – Back End Web Developer London & Hybrid working £40 – 50k Basic Hybrid working: 50% home based (two or three days/week from home) Working in their digital development team of a growing Digital Agency, this PHP Developer will be responsible for the Back End development to help build amazing solutions & websites for household names across Finance, Public Sector & Retail. Of course PHP is required, but you’ll also be encouraged to bring fresh ideas to the table to drive improvements across the business and help form their digital roadmap.

AI Python Developer 12 Month FTC in Belfast - up to £70k DOE We are looking for an AI Cognitive process automation developer with strong data engineering experience to design, build, and deploy intelligent solutions using LLMs, NLP, and ETL pipelines. The role involves end‑to‑end AI solution development, data processing, and building lightweight UIs for AI applications. Key Responsibilities Design and develop AI‑driven solutions using Python and modern AI/ML frameworks Build and integrate LLM‑based applications and agent workflows Develop data processing and ETL pipelines for structured and unstructured data Apply NLP and deep learning techniques for text understanding and generation Create interactive UI dashboards and demos using Streamlit Collaborate in Agile teams to deliver scalable, production‑ready solutions Ensure code quality, performance optimisation, and maintainability Required Skills & Experience Hands‑on experience in Python development Strong expertise in Python libraries: Pandas, NumPy, Matplotlib, Scikit‑learn Experience working with Large Language Models (LLMs) and AI agents Solid understanding of: Natural Language Processing (NLP) Deep Learning techniques Experience building ETL / data processing workflows Hands‑on experience building UIs using Streamlit Familiarity with Agile / Scrum methodologies

- Looking for your next step in backend development? Why not join a friendly, growing tech team at a specialist software company based in Liverpool. They brought development in-house two years ago and have gone from strength to strength. Now, they’re looking for a capable backend developer to support the continued evolution of their applications and grow alongside the team. What you’ll be doing: Building and supporting Azure-based microservices as part of a wider development team Developing and maintaining applications using .NET 8, .NET Core, and C# Contributing to shared internal libraries and improving existing codebases Working with data across technologies such as Azure Cosmos DB, MongoDB, MySQL, and MS SQL Server Getting involved in interesting projects including messaging, integrations, and data processing pipelines What’s in it for you: Competitive salary up to £60K (DOE)  Hybrid working (2–3 days per week in Liverpool city centre) Enhanced annual leave and family-friendly policies Wellbeing perks, including access to mental health support The opportunity to learn from experienced developers and work on modern, cloud-based systems If you’re a solid backend developer looking to deepen your skills, work on meaningful projects, and be part of a supportive, growing team, this could be a great next move. Apply today and take the next step in your career.

PHP Developer Want to take your career to the next level? Abacus Careers are delighted to be working with one of our Award-winning Lisburn based clients as they seek to add a talented PHP developer to their team. Totally unaffected by the pandemic, they continue to grow, which should help with any job security thoughts you may have They have lasting relationships with clients within the insurance, energy and finance markets providing them with high class software solutions You Degree educated in a relevant field 2+ years’ front end experience Javascript- Vue is preferable although not essential This is a small software team so everyone’s input is valid Why? Proper flexibility with a trusting team Progressive tech stack that grows Private medical insurance A proper “feel good” company to work for

Python Developer – 9 Months – Outside IR35 Python Developer required by a leading tech company for an initial 9-month contract. It’s fully remote, outside IR35, and will likely extend long-term due to the amount of work they have in the pipeline. The Role: You will be part of a rapidly growing software team helping to deliver their leading analytics application that is being used to help drive critical decision-making from gathering large amounts of intelligence on humanity and its use around the world – tech for good, you could say! As a Python Developer, you will be responsible for various tasks, mainly focusing on writing Python code to process and load data into the client’s proprietary service. The main tools you will be using day to day are: ** Python ** Django ** ETL pipelines ** Docker ** AWS You: Our customer is looking for someone well-versed with the above tools/technologies, and they need someone who has a strong understanding of Python and is willing to roll their sleeves up as this project is critical for them. As a team member, they expect you to pick up their tooling pretty quickly, work closely with others in the group and help build upon an already industry-leading product. Rate / Process: Depending on the candidate’s preference, this urgent role based in Bath can offer a hybrid or fully remote working model. It’s a two-stage interview process consisting of a call with the Head of Engineering and other team members. We can organise interviews within a few days as this is an absolute priority across the business. Rate-wise, it’s paying £400 – £450 per day + VAT. If this interests you, please apply immediately and call Andy Weir at Cathcart Technology. Cathcart Technology is acting as an Employment Business in relation to this vacancy.

Mobile Backend Developer (JAVA/Kotlin) 6 Month contract initially + Extensions Based: Hybrid - 2-3 days onsite in Manchester Rate: £425 - £525 p/d - (via Umbrella company) We have a great opportunity with a world leading organisation where you will be provided with all of the support and development to succeed. A progressive organisation where you can really make a difference. We have a great opportunity for a Mobile Backend Developer (JAVA/Kotlin) to join the team. We are seeking a Senior Application Engineer (Backend cloud based application development) with deep technical expertise and thought leadership. You will drive strategy for your area of expertise across teams and foster a developer community within your domain. The role involves mentoring junior staff, ensuring high-quality deliverables, promoting best practices like TDD and BDD, and leading engineering practices across the SDLC. Key Responsibilities; * Provide advanced technical expertise in Backend Development, supporting the team with effective solutions and practical insights. * Participate in all phases of the Software Development Life Cycle (SDLC), including requirements gathering, development, deployment, and ongoing maintenance. * Demonstrate a commitment to keeping up with industry trends, emerging technologies, and best practices, actively applying them in your work. * Contribute new ideas, tools, and methodologies to help foster a culture of continuous improvement and innovation within the team. * Share knowledge and mentor peers and junior engineers, supporting their growth and skills development. * Collaborate with technical leads, IT teams, and business stakeholders to understand project requirements, implications, and dependencies. * Review and provide feedback on technical documentation, suggesting improvements where appropriate. * Promote and practice best development approaches such as Test-Driven Development (TDD) and Behavior-Driven Development (BDD) to deliver high-quality, maintainable code. * Apply design patterns to address complex problems, ensuring code is efficient, readable, and reusable. * Adhere to IT and Information Security policies and procedures in all engineering activities. Key Skills & experience: * Preferred - Experience of building distributed scalable microservices using Java/Kotlin, Spring Boot, OAuth 2.0, Secure API design * Understanding of API design for mobile application with event driven architecture * Strong analysis and problem-solving skills * Knowledge of the financial services industry * Other technologies/areas: AWS, API Design, Automation testing

Backend Laravel Developer (Hybrid/Remote) Featured Apply Now 25 Feb 2026 Chester, Hybrid, Remote, Remote/Hybrid Full Time, Permanent Salary: Up to £60,000 DOE + Benefits + Career Salary up to £60,000 negotiable, depending on experience + benefits This is a great opportunity to work for an established and fast growing business, where you will have the opportunity to develop a worthwhile career. The company are experiencing significant growth and this will create genuine learning and development opportunities. They offer a hybrid/remote working model (REMOTE FIRST) which requires atleast one day  a month in their office in Chester. They are looking for a Backend Laravel Developer to further capitalise on their explosive growth over the last few years. The ideal candidate will work within an important part of the business and will have a passion to improve and develop systems and online capabilities. They are agile, focused and keen to gain further market share and the developer team is a key part of this growth strategy. They are seeking an inquisitive thinker.  Someone who asks lots of questions, and is a problem solver. Responsibilities   A Senior Backend Laravel Developer to assist in modernising the Laravel app. Must Haves: Experience: At least 2 years of Laravel  At least 5 years of frameworked languages (Laravel or others) SQL/MySQL/MariaDB indexes & table design Data: worked with big data and enjoys it Worked with many APIs, e.g Stripe, Google, AWS, OpenAI Understands Backend concepts such as Data Caching/Job Queues   Personable: Happy to travel to Chester once or twice per month Solve problems rather than a task worker Shows interest in the app Wants to work as part of small team but be a key figure Doesn’t rely on Junior developers (small agile team where everyone is involved) Asks lots of intelligent questions Great communication skills – written & verbal You see this as more of a hobby or passion than just a job – reads up on latest technology etc Wants to grow with the company, not just a stepping stone Would Be Lovely: Has worked in a similar industry Worked with an app with a huge number of database models (theirs has 800+) Has worked with microservices DevOps experience, e.g. taking a MySQL backup What we can offer: You will learn a lot and quickly – Marketplace app Ability to change and see your work in a real world environment used by millions The company care about what they do and you will care about their impact Flexibility Start up mentality Competitive salary up to £60,000 negotiable, depending on experience + benefits

PHP Web Developer<BR><BR>Hybrid working in Central Brighton<BR><BR>Stratospherec are delighted to be recruiting for a new Web Developer role we have for a client based in Central Brighton&nbsp;<BR> &nbsp;&nbsp;<BR> This role is offered on a hybrid basis - remote and in office working and with a salary to &pound;48k plus excellent bonuses and benefits.<BR> &nbsp;&nbsp;<BR> As a company they are well known for building cutting edge web software and digital systems for their clients. They are coming to market with a brand new software product and are looking for candidates that can work on their existing client systems in Wordpress and the new software platform built in PHP and Laravel<BR> &nbsp;&nbsp;<BR> They have a great group of fun, friendly and focused professionals working to build amazing digital products for their clients.&nbsp;<BR> &nbsp;&nbsp;<BR> Required Skills &amp; Experience<BR> <UL> <LI>3+ years of professional PHP development</LI> <LI>Strong experience in WordPress theme and plugin</LI> <LI>Solid understanding of WordPress hooks, filters, and REST</LI> <LI>Practical exposure to Laravel or Symfony</LI> <LI>Good understanding of MVC architecture&nbsp;</LI> <LI>Experience working with MySQL or equivalent database</LI> <LI>Proficiency with Git or similar</LI> </UL> Desirable Skills<BR> <UL> <LI>Experience with headless or decoupled WordPress</LI> <LI>Exposure to modern JavaScript frameworks (React, Vue, ).</LI> <LI>Experience integrating payment gateways, CRMs, or third-party</LI> <LI>Familiarity with Docker or containerised development</LI> <LI>Experience with CI/CD pipelines and automated</LI> <LI>Ability to contribute to technical documentation and client-facing</LI> </UL> &nbsp;&nbsp;<BR> If this role might be of interest, then please apply with your CV for immediate interview?

Nottingham Trent House (95002), United Kingdom, Nottingham, Nottinghamshire Staff Software Engineer - Back End About this role Do you love shaping the technical landscape and driving innovation across the organisation? Are you passionate about solving complex business problems and supporting multiple teams toward a shared technical vision? At Capital One, you'll be part of a community of technical leaders who drive engineering excellence, foster innovation, and deliver impactful solutions that meet real customer needs. What You'll Do Own and drive the technical strategy for a significant business outcome or technology domain, spanning multiple teams and influencing the overall technical direction Lead and coordinate the efforts of multiple teams, ensuring their collective work aligns with broader business objectives and technology strategy Proactively identify emerging patterns, define and evangelise best practices, and establish reusable frameworks that enhance engineering productivity Build and maintain strong relationships with key stakeholders, including senior leadership, product owners, and architects Represent Capital One in external technical forums, contributing to vendor/industry discussions Drive service quality standards and practices for your domain, guiding complex incident resolution Develop and advocate for strategies to proactively manage technical debt across multiple teams Actively mentor and develop engineers, fostering a culture of continuous learning What we’re looking for Deep expertise in Java Deep expertise in system design and distributed architectures Track record of leading technical initiatives across multiple teams Strong experience with cloud platforms (AWS, Azure, GCP) Proven experience setting a multi-team technical vision and strategy Strong track record of technical leadership and influence without authority Experience driving engineering standards and best practices across organisations Experience of steering Communities of Practice or technical forums Strong business acumen and ability to translate technical concepts for various audiences Where and how you'll work This is a permanent position based in our Nottingham office. We have a hybrid working model which gives you flexibility to work from our office and from home. We’re big on collaboration and connection, so you’ll be based in our Nottingham office 3 days a week on Tuesdays, Wednesdays and Thursdays. What’s in it for you Bring us all this - and you’ll be well rewarded with a role contributing to the roadmap of an organisation committed to transformation We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers) Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance – with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave Open-plan workspaces and accessible facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café What you should know about how we recruit We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it’s about what you do, not just what you say. That’s why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages. We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few: REACH – Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies OutFront – to provide LGBTQ+ support for all associates Mind Your Mind – signposting support and promoting positive mental wellbeing for all Women in Tech – promoting an inclusive environment in tech EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry Enabled - focused on supporting associates with disabilities and neurodiversity Capital One is committed to diversity in the workplace. If you require a reasonable adjustment, please contact ukrecruitment@capitalone.com All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment. For technical support or questions about Capital One's recruiting process, please send an email to Careers@capitalone.com Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site. Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC). Who We Are At Capital One, we're building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a mission to help our customers succeed by bringing ingenuity, simplicity, and humanity to banking. We measure our efforts by the success our customers enjoy and the advocacy they exhibit. We are succeeding because they are succeeding. Guided by our shared values, we thrive in an environment where collaboration and openness are valued. We believe that innovation is powered by perspective and that teamwork and respect for each other lead to superior results. We elevate each other and obsess about doing the right thing. Our associates serve with humility and a deep respect for their responsibility in helping our customers achieve their goals and realize their dreams. Together, we are on a quest to change banking for good.

AI Trainer - Advanced Python Developers (US) Remote Apply AI Trainer - Advanced Python Developers   About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world.  Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We’re looking for Python Developers to help train and evaluate cutting-edge AI models. If you have the necessary experience, we’ll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you’ll be invited to join Prolific as a Domain Expert participant, where you’ll get paid to train and evaluate powerful AI models.  Researchers looking for your skills tend to pay $40/hr per AI task completed. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter.   What you’ll bring Python developer skills and verifiable professional experience as a Python developer A willingness to take our skills verification test to assess your suitability for our Domain Expert participant pool Strong attention to detail and the ability to concentrate on complex tasks for up to one hour at a time A reliable and fast internet connection and access to a computer A willingness to self-declare your earnings, as our participants are self-employed A Paypal account to receive payment from our clients What you’ll be doing in the role  Completing AI training tasks such as analyzing, editing, and writing Python Judging the performance of AI in performing Python-related prompts Improving cutting-edge AI models

The role: We are looking for highly talented and driven software engineers who take pride in their work, to expand our Engineering team in London. Successful candidates will join a cross functional team including product managers and designers working closely with the rest of our business to deliver working code that solves real problems for both internal and external customers. You will take ownership of the services managed by your team, ensuring that their development aligns with the higher level AlphaSights Engineering strategy, while mentoring more junior Engineers. If you have a strong passion for solving problems with code, and want to work with exceptional colleagues in a high achievement environment, this role is a good fit for you. What you’ll do: Design solutions: Define the best technical solutions to business problems, contributing to an architectural vision that will scale up to be the world s leading research platform. Ship working code: We primarily work with React on the frontend and Kotlin microservices with Postgres on the backend, with some older services written in Ruby on Rails. We’ve always got an eye open to assess new technologies that might improve our stack. Deploy and iterate: We release frequently to our customers, using CIrcleCI and Spinnaker for CI/CD, and quickly gather feedback in order to inform our next iteration. Build your competency: You will learn quickly by building market-leading technology with experienced colleagues in a high performance environment. Engineers can also use our L&D budget to fast-track development of specific technical competencies. Maintenance and troubleshooting: Carefully monitor our services, catching errors before users notice them, diagnosing the root cause and deploying fixes. Who you are: You probably have a degree in a STEM subject, but we’re happy to work with people who perfected their craft via a different route. Experience working at a similar level in a mature Engineering team, and looking to take your career to the next level. We’re looking for people who have incredible potential. Technical expertise with at least one programming language (we use Kotlin and a bit of Ruby), and ideally experience with relational databases. Proven track record – You’ve made a demonstrable impact in your previous roles, standing out from your peers. Highly driven and proactive – you relentlessly and independently push through hurdles and drive towards excellent outcomes. Highly driven and proactive – you relentlessly and independently push through hurdles and drive towards excellent outcomes. Meticulous – you hold high standards and have an obsessive attention to detail. Learn more about our tech organization here! Don t worry if your experience or background doesn t match all of these areas, we believe a broad spectrum of experience provides great perspective on solving problems in new and innovative ways and we’d love to hear from you. Please note that unfortunately, we are unable to sponsor visas for this position. AlphaSights is an equal opportunity employer.

Do you have expertise with low latency software engineering within finance or gaming environments? You could be progressing your career in a senior, hands-on Back End Engineer role at a hugely profitable High Frequency Trading firm that specialise in crypto markets and earning substantial bonuses. What's in it for you: Salary to £180k Bonus (c50% of base) Pension Hybrid working Career progression Your role: As a Back End Engineer you will design and develop high throughput back end services for microsecond real-time risk, pricing, trading engines and market making systems, working across the full software development lifecycle using Rust. You'll collaborate with a small, talented team, problem solving and working on complex and challenging systems with interesting work. Location / WFH: You'll join the team in Central London with flexibility to work from home 1-2 days a week. About you: You have commercial Rust development experience You have strong backend OOP, multithreaded software engineering experience (e.g. C++, Java, Python) You have experience of working on high throughput, low latency systems with microseconds / nanoseconds, within a finance (or games) environment You have a good understanding of low level system design, Operating Systems, Networking, Socket Level programming, hardware, compliers, FPGA You achieved a 2.1 or above in Computer Science from a top tier university You are collaborative and pragmatic with great communication and stakeholder management skills, also with some leadership or mentoring experience Apply now to find out more about this Back End Engineer / Developer (Rust HFT High Frequency Trading) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Junior Python Developer / Engineer (Computer Science) London / WFH to £65k Do you have a first class Computer Science education combined with backend Python coding skills? You could be progressing your career at a successful and growing technology company that have recently received £30 million of series B funding. The core product allows business users to capture data via integrated mobile services utilising video analytics and speech recognition to analyse and categorise information within the workflows of large field workforces (field engineers, field service, auditing, reporting, health-and-safety, sales, etc.); customers are typically large multinationals: utilities, telecoms, manufacturing and facilities management companies. As a Junior Python Developer you'll design and develop new features and enhancements to the core platform and APIs working with Python within an AWS environment. You'll work across the full software development lifecycle to design robust, scalable, performant and secure implementations for new features. You'll be continually learning and enhancing your skills as part of a highly talented remote team. Location / WFH: You can work from home / remotely form anywhere in the UK. About you: You are degree educated in Computer Science, having achieved a 2.1 or above from a top tier university (e.g. Russel Group) You have commercial backend Python development experience You have a good knowledge of databases, PostgreSQL preferred You have a good understanding of Web API architecture e.g. REST APIs and messaging systems You are familiar with SaaS, big data and analytics, machine learning, computer vision and AI algorithms You're a collaborative problem solver with great communication skills Experience with video and audio processing or video streaming would be great but not essential What's in it for you: Salary to £65k Remote working plus flexible, family friendly working hours Stock ownership plan Private Healthcare Pension Apply now to find out more about this Junior Python Developer / Engineer (Computer Science) opportunity.

Mid - Senior Backend Engineer Location: Remote - CET B2B 12 month renewable contract We’re looking for a Mid–Senior Backend Engineer to design, build, and scale backend systems for a real-time multiplayer game. This is a hands-on role where you’ll implement game features, optimize infrastructure, and ensure high performance, scalability, and security across distributed services. You’ll collaborate closely with production, design, and engineering teams to deliver end-to-end solutions—from architecture and development through to deployment and monitoring. You’ll also build automated tests, improve observability through metrics and logging, and contribute to a strong engineering culture through code reviews and knowledge sharing. What we’re looking for: 5+ years of backend/server development experience Strong C# and modern .NET expertise Experience with cloud platforms (ideally AWS) Solid understanding of distributed systems and scalability Experience with databases such as MongoDB and Redis Familiarity with CI/CD pipelines and Kubernetes Nice to have: Experience with Unity or game networking concepts Background in real-time multiplayer systems Experience with infrastructure-as-code and observability tools

About the roleYou'll join Clarify as a Backend Engineer, building the foundational systems that power our AI-native CRM. You'll work directly with founders to architect critical infrastructure—from data pipelines and integration frameworks to developer tooling and system reliability. This is a role for someone who has built scalable platforms and is excited to establish best practices from the ground up with modern tooling and AI-first principles.What you’ll doBuild core platform systems: data pipelines, integration framework, API infrastructure, and developer tooling.Design scalable data models and storage strategies for complex CRM workflows and AI capabilities.Establish observability, monitoring, and performance standards as we scale to thousands of customers.Create platform standards: API patterns, service design, testing frameworks, and deployment practices.Own critical technical decisions: infrastructure choices, architectural patterns, and technology selection.Partner with founders on technical strategy, balancing innovation with pragmatic execution.Your background6+ years building distributed systems and platform infrastructure.Strong expertise in database design, query optimization, and managing data at scale.Proficient in TypeScript, Node.js, React, Next.js, and Postgres.Experience building developer-facing infrastructure: APIs, SDKs, or internal tooling.Pragmatic technical decision-making: balancing technical excellence with business impact.Strong operational instincts: monitoring, alerting, debugging, and incident response.Excellent communication—translate complex technical concepts for various audiences.Startup experience preferred—you've built 0-to-1 products or scaled through hypergrowth.Bonus: Experience with AI/ML infrastructure, LLM APIs, or vector databases.Bonus: Open source contributions or technical writing demonstrating expertise.

Are you a data savvy Software Engineer with strong backend development experience using TypeScript and Node? You could be progressing your career in a senior, hands-on Back End Developer role at a scaling Fintech who have built an energy trading platform to revolutionise energy buying for large industrial and commercial users. As a Back End Developer you'll help to build a seamless digital experience that makes complex energy systems simple, powerful and intuitive. You'll be building resilient, modular backend services, data models, data flows between Postgres, Redshift, analytics layers and APIs that underpin complex trading, billing and analytics platforms. There's a collaborative team environment where you'll input into technical discussions and decision making. Location / WFH: There's a remote first policy so you can work from home on a full time basis, with the caveat that you'll meet up with the team in London from time to time (approximately once a quarter, paid for). Please note you must be UK based and have the right to work. About you: You have strong software engineering experience across the full development lifecycle You have expertise with backend TypeScript, Node, Python and APIs You have a good knowledge of AWS You have experience with PostgreSQL, DBT and Amazon Redshift, and have had exposure to data pipelines, ETL, data modelling and LLMs You have a good understanding of event driven systems You're comfortable working with complex, data rich environments and have previous experience within Fintech, Payments, eCommerce or similar with high throughput systems You're happy to do some brownfield, refactoring and maintenance work alongside new projects You're collaborative with great communication skills

Are you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career? You could be joining a global technology consultancy. As a Java Developer / Consultant you will design, develop and deliver a range of transformational projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. You'll join a collaborative team with a focus on engineering best practice and continuous improvement of client systems; you will have lots of business and client exposure and continual learning and development opportunities. Location / WFH: There's a hybrid work from home policy with three days a week in the London, City office (or at client sites), you'll join a friendly, diverse, upbeat team. About you: You have Java development skills including multi-threading and concurrency You have experience with SpringBoot and microservices environments You have a good knowledge of REST APIs You have a good understanding of AWS You have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures and Design Patterns You are familiar with DevOps, CI/CD pipelines You're collaborative, enjoy problem solving and interacting with clients What's in it for you: As a Java Developer / Consultant you will earn a highly competitive package: Salary to £90k Pension, Life Assurance, Income Protection Private medical care for you and your family, including mental health Travel Insurance Charitable giving Gym membership for you and your family Flexible holiday scheme Apply now to find out more about this Java Developer / Consultant (SpringBoot AWS microservices Java) opportunity.