Senior Software Engineer .NET Java & AI Development

Antal Remote Warszawa 2026-10-23
  • 5+ years of commercial software development experience.
  • Strong expertise in .NET/C# (preferred) or Java.
  • Hands-on experience with AI-assisted development tools, ideally Claude Code.
  • Experience with Specification-Driven Development or specification-first engineering approaches.
  • Strong understanding of software architecture, clean code, testing, and modern development practices.
  • Ability to critically assess and improve AI-generated solutions.
  • Independent, analytical, and delivery-focused mindset.

Nice to Have

  • Recent experience with Claude Code in specification-driven workflows.
  • Experience with GitHub Copilot, Cursor, or similar AI coding platforms.
  • Cloud experience (Azure or AWS).
  • Familiarity with Docker and distributed systems.
  • Experience promoting AI-assisted development practices within engineering teams.



We are looking for a Senior Software Engineer with strong expertise in .NET/C# or Java and practical experience using modern AI coding tools. This role combines hands-on software development with AI-assisted coding and Specification-Driven Development (SDD), focusing on delivering reliable enterprise applications without compromising engineering quality.



📍 Location: Remote (within Poland)
💼 Employment Type: B2B
💰 Rate: 160-180 PLN/h
🌍 Language: English (fluent)





,[Design, develop, and maintain enterprise applications using .NET/C# or Java., Translate business requirements into structured specifications and production-ready solutions., Leverage Claude Code, GitHub Copilot, Cursor, and similar AI tools throughout the development lifecycle., Review, validate, and improve AI-generated code to ensure quality, security, and maintainability., Collaborate with Product Owners and engineering teams to deliver scalable software solutions., Apply best practices in testing, debugging, code reviews, Git, and CI/CD., ] Requirements: .NET, C#, Java, Claude, Clean Code, Testing, GitHub, AI, Cloud, Azure, AWS, Docker