Our client US based IT product company is looking for Middle AI/Backend Developer. Must have: Python 3+ yrs - FastAPI, async, Pydantic, SQLAlchemy + Alembic, RQ/APScheduler LLM stack - LangChain, LangGraph, LiteLLM, OpenAI API, RAG (chunking, retrieval, reranking) ML - PyTorch, Hugging Face Transformers, scikit-learn, NumPy/Pandas MongoDB + MQL - aggregation pipelines ($match, $group, $lookup), complex queries - mandatory Databases - Redis, PostgreSQL, Qdrant (vector search) Cloud/LLM providers - AWS Bedrock, Ollama, OpenAI/Anthropic API Docker + Docker Compose (multi-service stacks, GPU images) Security - JWT, TLS, HMAC, PII anonymization/pseudonymization Protocols - REST, WebSocket, A2A (agent-to-agent), MCP Request classifier / intent routing for LLM agents Whisper (ASR, speech-to-text integration) Nice to have: Go, Jenkins, LangFuse, OpenTelemetry, Prometheus/Grafana, RAGAS, Ollama, TensorBoard Soft skills: self-sufficient, accountable, resilient under pressure, able to own a sub-project end to end.