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September 3, 2026

Fullstack Developer (C# and React/Angular)

Mid • On-site

15,000 - 20,000 PLN/yr

Krakow, MA, Poland

About the Role

We're seeking a Full Stack Developer to join our product team and contribute across backend architecture and customer-facing interfaces. You'll collaborate with the Team Lead, Product Manager, and Product Designer to build reliable, secure, high-quality software.

As part of the team, you'll participate in code reviews, uphold strong testing practices, and effectively use AI-assisted development tools like Cursor or Claude Code.

What You'll Do

Backend Development

  • Build and evolve backend applications in .NET 10 and C# 14.
  • Design REST APIs that are consistent, secure, and well-documented.
  • Work with PostgreSQL database structures and help optimize queries, indexes, and overall performance.

Frontend Development

  • Build user interfaces in Angular/React and TypeScript.
  • Take an active role in the frontend rewrite using Angular/React.
  • Ensure UI implementations are performant, maintainable, and true to the product design.

Quality & Testing

  • Treat unit and integration 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 standards.

AI-Assisted Development

  • Use AI tools, including Cursor, Claude Code, or similar tools, to accelerate development, code analysis, and refactoring.
  • Critically evaluate the correctness, quality, security, and performance of AI-generated code before release.

Delivery & Collaboration

  • Work within GitHub and CI/CD to deliver features reliably and on time.
  • Collaborate closely with the Team Lead, Product Manager, and Product Designer, and actively participate in Agile ceremonies.
  • Share knowledge with the team.

What We're Looking For

  • Solid hands-on experience with .NET and C#.
  • Experience building interfaces in Angular/React and TypeScript.
  • Experience designing REST APIs and working with PostgreSQL.
  • A genuine testing habit: unit and integration tests as standard practice.
  • Comfort participating in code reviews and giving direct, useful feedback.
  • Practical experience with AI-assisted development tools and the judgment to critically assess their output.
  • Good command of English and strong collaboration skills within a cross-functional team.

Why This Role Matters

This role involves more than shipping features: it offers real input into technical decisions, architecture, and process. You'll work alongside a Team Lead, Product Manager, Product Designer, and wider Engineering and Platform teams to help raise the team's technical bar.

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