Lead AI Back-End Engineer

Must have experience

• 7 + years building and scaling production backend systems, including 2+ years in a technical lead, staff, principal, or equivalent role.
• Expert in REST API design and development using Python FastAPI or .NET C# APIs , with strong experience in dependency injection, middleware, profiling, performance optimization, and distributed systems.
• Hands on leadership experience with Semantic Kernel or equivalent agent and LLM frameworks , including production agent orchestration, tool calling, structured outputs, and multi step workflows.
• Delivered at least one production RAG system or pipeline using a vector or hybrid search platform such as Azure AI Search, pgvector , Chroma, or equivalent, with measurable latency and quality KPIs.
• Deep PostgreSQL expertise plus SQLModel , SQLAlchemy 2, and Alembic migrations at scale.
• Proven track record integrating multiple frontier and cost optimized model providers, such as OpenAI GPT 5.6, Gemini 3.x, Claude 5, Grok 4.x, or equivalent , including model routing, structured output, reasoning, tool calling, and fallback strategies.
• Fluency with Poetry, Docker, GitHub Actions, Azure DevOps, Jenkins, or Argo , along with infrastructure as code fundamentals and blue green or canary release strategies.
• Strong people leadership through code reviews, architectural guidance, technical mentoring, roadmap planning, hiring, and cross team communication.

Nice to have