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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
Apply now
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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