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AI-enabled Senior .NET Developer

Office in Bulgaria
.NET
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We are seeking a Senior .NET Developer to join our team, focusing on the development of AI agents and supporting backend and frontend applications in a high-impact environment. You will play a key role in shaping innovative solutions that drive business value and client success.

If you are passionate about AI and eager to make a difference, we encourage you to apply!

Responsibilities
  • Design and implement backend and full-stack applications, AI agents and platform components
  • Build developer tooling, CI/CD and observability for safe, fast iteration
  • Apply secure SDLC and privacy-by-design practices
  • Perform TDD and BDD as part of everyday engineering practices
  • Collaborate with cross-functional teams to deliver customer-focused solutions
  • Use current LLM patterns (RAG, retrieval, routing, tool-use, evals) to deliver reliable, efficient AI systems
Requirements
  • 5+ years of professional software engineering experience
  • Strong full-stack development skills (C#, .NET Core, and ASP.NET Core, TypeScript, Angular and/or ReactJS)
  • Experience with AI agents and implementing AI Software Development Life Cycle with maturity 2.5+
  • Cloud experience (AWS/Azure/GCP)
  • Skills in designing and implementing REST APIs
  • Understanding of CI/CD principles and tooling
  • Understanding of DevSecOps concepts, secure coding, and automated quality gates
  • Excellent problem-solving and communication skills
  • English proficiency at an Upper-Intermediate level (B2) or higher
Nice to have
  • Experience with LangChain/LangGraph, vector/RAG systems or OpenSearch
  • ML experience (training, deployment, monitoring)
  • Understanding of LLMs, fine-tuning and model adaptation