Associate AI Engineer

Fuel Cycle is hiring an Associate AI Engineer to build and improve production AI agents and agentic systems. The role also involves developing APIs, RAG pipelines, MCP tools, and background processing, with mentorship from senior engineers in an in-office Los Angeles setting. Responsibilities Design, build, and improve AI agents, deciding how tool-calling loops, model configuration, and multi-step workflows are structured using Strands Agents and AWS BedrockBuild and integrate MCP tools and servers, and learn how tool names and descriptions shape what an LLM doesDeploy and run agents on Bedrock AgentCore, working with the platform team and your mentorBuild RAG pipelines over pgvector or FAISS, choosing chunking, embedding, and retrieval approaches based on what the results showDesign, test, and iterate on prompts; evaluate answer quality, latency, and token cost, and decide which tradeoffs to make; learn how guardrails are applied in production pathsEvaluate models, tools, and approaches, and recommend which to use, with your reasoning documentedShip features and bug fixes in FastAPI services (REST and WebSocket APIs backed by PostgreSQL and Redis), deciding how to design, implement, and test themContribute to background jobs and queue consumers so agent work runs outside the API request pathApply our architectural standards, use your judgment on design choices within them, help keep design documents current, and flag where the standards should changeSubmit pull requests, respond to review feedback, and review teammates’ code as you grow