About the Role
Location: Remote (Poland) - ability to meet in Poznan once per month Type: Full-time Experience level: Mid / SeniorAbout the companyOur client is an early-stage, product-driven startup led by experienced founders with deep backgrounds in large-scale distributed systems, AI-powered platforms, and enterprise SaaS. They are now expanding the engineering team to accelerate product development toward design partners and early adopters in 2026.They’re building real-time Artificial Sales Intelligence that supports sales representatives during live customer conversations. Their platform joins live sales calls, transcribes them in real time, and delivers context-aware guidance, dynamic sales playbooks and instant knowledge recall without increasing cognitive load for the rep. The goal is simple but ambitious: turn every sales call into a confident, high-impact conversation. The Role We are looking for a Mid-Senior Full-Stack Engineer who is comfortable owning features end-to-end from UI to backend to cloud infrastructure. You will work directly on the company’s core product, building real-time user interfaces, scalable APIs, and cloud-native services that power live AI-assisted sales calls. This role is hands-on, highly technical, and suited to someone who enjoys solving complex problems in a fast-moving startup environment. You will collaborate closely with the founders on product architecture, technical decisions, and delivery.What You Will DoDesign, build, and maintain full-stack features using TypeScript across frontend and backendDevelop responsive, real-time user interfaces in ReactBuild and evolve backend services and APIs running on AWSWork with containerized services using DockerOperate comfortably in a Linux-based development and production environmentContribute to system architecture decisions for scalability, latency, and reliabilityCollaborate via GitHub using modern workflows (PRs, code reviews, CI)Debug, profile, and optimize performance in real-time systemsWork asynchronously and communicate clearly in a fully remote teamMust-Have RequirementsStrong commercial experience with TypeScriptSolid experience with ReactHands-on experience with AWS (e.g. EC2, ECS/EKS, Lambda, S3, IAM or equivalents)Comfortable working in Linux environmentsPractical experience using DockerDaily use of GitHub (or equivalent Git-based workflows)Fluent spoken and written EnglishProven ability to work effectively in a remote setupStrong problem-solving mindsetBachelor’s degree (BSc or equivalent) in Computer Science or a closely related fieldShould-Have SkillsExperience building APIs with ExpressFamiliarity with Tailwind CSSGood understanding of algorithms and data structuresWorking knowledge of network protocols (HTTP, WebSockets, streaming concepts)Solid understanding of databases (SQL and/or NoSQL)Nice-to-HaveExperience with LangChain or similar LLM orchestration frameworksFamiliarity with Auth0 or modern authentication/authorization systemsExperience using shadcn/uiPrevious experience in real-time systems, AI-powered products, or SaaS platformsWhat We OfferOpportunity to build a core product from an early stage, not just incremental featuresDirect impact on product direction and technical architectureWork closely with experienced founders and a small, highly skilled teamFully remote-first working environmentCompetitive salary aligned with experience and responsibilityMeaningful equity participation for senior contributorsHigh level of autonomy, trust, and ownershipA product-focused culture that values clarity, quality, and real customer impactThis role is ideal for an engineer who:Enjoys end-to-end ownershipThinks in systems, not just componentsIs comfortable with ambiguity and fast iterationCares deeply about product quality and real user valueWants to help define the technical foundations of a new company