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June 3, 2026

Fullstack Developer (React + .NET)

Senior • Remote

Warsaw, Poland

Summary: A senior full-stack developer position focused on enhancing our platform through modern technologies, primarily using React and TypeScript on the frontend and .NET/C# with SQL Server on the backend.

Main Responsibilities:

  • Strengthen the focus on React and TypeScript as the primary and most critical skills, with a solid foundation in modern JavaScript.

  • Utilize .NET/C# and SQL Server as supporting skills to ensure self-sufficiency in day-to-day tasks without primary responsibility for complex backend or database optimization.

  • Leverage knowledge of legacy technologies, such as Classic ASP, for understanding existing logic as a nice-to-have skill.

Key Requirements:

  • At least 5 years of experience (Mid-level) or 10 years (Senior-level) in full-stack development.

  • Proficiency in React and TypeScript.

  • Solid foundation in modern JavaScript and C# / .NET.

Nice to Have:

  • Experience with legacy systems like Classic ASP.