SINGU - Full-stack Developer (React + .NET)
Requirements
• Backend: .NET 10, C# 14, REST APIs, Redis • Database: PostgreSQL • Frontend: React (TypeScript) , AngularJS • Tooling: GitHub, CI/CD, unit and integration testing • AI-assisted development: Claude Code / Cursor / Copilot are part of our daily workflow • 3+ years of commercial React development with strong TypeScript • Working C# knowledge: you can work in an existing codebase, ship smaller backend changes and grow from there • Proven experience integrating and designing REST APIs • Working knowledge of PostgreSQL • A genuine testing habit: unit and integration tests as standard practice • Comfort participating in code reviews and giving direct, useful feedback • Ownership of delivered features, from technical design to production and support • Practical experience with AI-assisted development tools, and the judgment to critically assess what they produce • Communicative English (B2+): technical specs, tickets, documentation • Communicative Polish (B2+): the team works in Polish internally • Experience improving test automation and local development environments • Docker and cloud (AWS)
Responsibilities
• Frontend Development • Build user interfaces in React and TypeScript as a core contributor to our frontend rewrite • Turn designs into responsive, accessible and performant UI, built on maintainable code • Contribute to shared components and our design system • Backend Development • Backend Development • Build and extend backend features in .NET 10 and C# 14 • Design and develop REST APIs that are consistent, secure and well documented • Work with PostgreSQL database structures and help optimize queries, indexes and performance • Quality & Testing • Quality & Testing • Treat unit, integration and end-to-end testing as a core part of development, not an afterthought • Participate in code reviews with clear, constructive feedback • Write clean, secure, maintainable code aligned with our standards and best practices • AI-Assisted Development • Use AI tools (Cursor, Claude Code or similar) to accelerate development, code analysis and refactoring • Evaluate the correctness, quality, security and performance of AI-generated code before it ships • Delivery & Collaboration • Take part in product discovery and feature specification, as well as technical breakdown and estimation before development starts • Work within GitHub and CI/CD to deliver features reliably and on time, and own them through to production • Collaborate closely with the Team Lead, PM and Designer day to day and actively participate in Agile ceremonies • If this role sounds like a good fit, we’d love to hear from you. Apply and help us build technology that supports critical operations every day.
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