Full Stack Software Engineer

<p>Papaya Global is a rapidly growing, award-winning B2B tech unicorn with an ambitious mission to revolutionize the payroll & payments industry. With over $400M raised from multiple tier-one investors, our innovative technology provides a comprehensive solution for managing global workforces, encompassing everything from hiring and onboarding to managing and paying employees in over 160 countries.</p><p>We are looking for a <strong>Full Stack Software Engineer</strong> to join our team in Krakow or remotely from anywhere in Poland. </p><p>Our Financial Compliance engineering team sits at the heart of that: we connect external systems, enforce data integrity, and expose reliable APIs that the rest of the platform depends on. The work is technically demanding - distributed systems, relational data at scale, strict correctness requirements - and deeply collaborative. We're a small team, we share knowledge openly, and nobody gets left alone on hard problems. </p><p><strong>You Will:</strong> </p><ul><li>Build and maintain backend services in Java/Spring Boot - APIs, integrations with external systems, data processing and storage in relational databases </li><li>Work with AWS services (S3, SQS, SES) as an integral part of building and connecting systems — infrastructure changes affect your work directly, and you'll need to understand what's under the hood. </li><li>Contribute to frontend interfaces in TypeScript/React (roughly 20% of your time) </li><li>Take part in technical and architectural discussions - your opinion matters, and you'll grow into bigger decisions over time </li><li>Write clean, well-tested code and care about it staying that way through code reviews and pair programming </li><li>Own observability of your services - we catch bugs from charts before users notice them, and we're proud of that </li><li>Work closely with Product, DevOps, and other engineering teams to deliver end-to-end features </li><li>Work in Scrum with a team that uses it as an advantage </li></ul> <br><h3>Requirements</h3> <ul><li>Your IDE is not an obstacle for you but an almost invisible tool – we expect fluency in IntelliJ or VSCode or (Neo)Vim </li><li>You have solid production experience with backend systems in Java - Spring, HTTP APIs, and relational databases are core parts of your background </li><li>You have working knowledge of frontend development in TypeScript and React, even if the majority of your time is spent on the backend </li><li>You actively use AI-powered development tools (Claude Code, Cursor, Codex or similar) as a standard part of your development workflow. We push beyond the comfort zone here and expect the same from you </li><li>You have working knowledge of AWS services - S3, SQS, SES </li><li>You have experience with CI/CD pipelines and take test automation seriously </li><li>You think about non-functional requirements - availability, reliability, security, observability </li><li>You write clean, readable code and maintain that standard through code reviews </li><li>Fluent written and spoken English </li></ul> <br><h3>Nice to have</h3> <ul><li>Experience building AI-powered applications — we are moving towards developing internal expert systems driven by LLMs, and contributions in this area are welcome from day one. Familiarity with AWS Bedrock is a plus </li><li>Comfort working in fast-moving product teams with short delivery cycles, real demos, and tight MVP timelines — this is part of how we build new products at Papaya Global </li><li>Basic familiarity with Terragrunt or similar IaC tooling </li></ul>