.NET Backend Developer

Lublin, Poland Posted 4d First seen 2d
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  • 3+ years of experience developing backend applications.
  • Strong knowledge of C# and .NET 8.
  • Experience with Entity Framework / Entity Framework Core.
  • Good understanding of layered / three-tier backend architecture.
  • Ability to review and improve AI-generated code.
  • Practical experience with AI coding tools such as Claude Code, OpenAI Codex, GitHub Copilot, Cursor or similar solutions.
  • Understanding of Agentic AI and AI-assisted development workflows.
  • Good knowledge of Clean Code and basic software design principles.
  • Experience with Microsoft SQL Server and relational databases.
  • Experience working with APIs and system integrations.
  • Experience working with legacy systems or legacy data will be an advantage.
  • Good debugging and problem-solving skills.
  • English at B2 level or higher.

What We Are Looking For

We are looking for a hands-on developer who is comfortable working together with AI coding agents and can critically evaluate the code they produce.

You don't need to be an AI expert or software architect. What matters is that you have a solid foundation in C#/.NET backend development and can use tools such as Claude Code, Codex or GitHub Copilot effectively.

The ability to recognise when AI-generated code is incorrect, poorly designed or unsuitable for production is particularly important.

  • AI generates the code — you guide it, review it, improve it and make sure it actually works.