Senior FastAPI Engineer

ppWe’re working with a fast-growing AI company looking for a Senior FastAPI / Python Engineer to take ownership of the backend powering its AI products. You’ll build the APIs, data pipelines and orchestration layer connecting the product with LLMs, working across retrieval, tool-calling, response streaming and long-running background jobs. This is far beyond traditional CRUD development — you’ll be solving complex problems around AI reliability, performance, scalability and confidential data, with genuine ownership over architecture and technical decisions. /p h3Must Haves /h3 ul li7+ years building backend systems in production /li li6+ years Python /li li3+ years FastAPI /li liStrong PostgreSQL / SQL /li li2+ years Redis /li liStrong experience designing and building production APIs /li liExperience with async / distributed systems and background processing /li liStrong understanding of reliability, scalability and production performance /liliComfortable taking end-to-end ownership of backend systems /li liExperience using AI coding tools such as Claude Code, Cursor or Copilot /li liComfortable working in a fast-moving startup environment /li /ul h3Nice to Haves /h3 ul liExperience building LLM-powered applications /li liRAG / retrieval systems /li liVector search / vector databases /li liAI agents and tool-calling /li liLangChain or LlamaIndex /li liSSE, WebSockets or other streaming technologies /li liDocument ingestion and embedding pipelines /li liMicrosoft Graph /li liEmail integrations /li liExperience integrating with external document/storage platforms /li liExperience handling confidential data within production AI systems /li /ul /p #J-18808-Ljbffr