Description
The Data team at OfferUp is seeking an AI Engineer to join their team. As an AI Engineer, you will own production systems that turn marketplace intelligence into real customer experiences. You will work on building AI systems that drive results across Search & Discovery, Trust & Safety, Advertising, and core Personalization.
Responsibilities:
- Design and build agentic AI systems and RAG pipelines for production features across the marketplace.
- Integrate LLMs into product experiences across search, categorization, communication, and trust & safety.
- Partner with Data Scientists and Engineers to turn research into shipped products.
Requirements:
- 2-4 years building and deploying AI/ML systems in production.
- 2+ years professional Python development.
- Hands-on experience with agentic frameworks (LangChain, LangGraph, or similar).
- Practical experience building RAG systems (vector search, semantic chunking, rerankers).
- Experience with LLM APIs, prompt engineering, and structured outputs.
- Proficiency with async Python (asyncio, streaming) and Pydantic.
- Strong SQL skills for large-scale data systems.
- Bachelor's in CS, Math, Statistics, or related field (or equivalent experience).
- Collaborative mindset and strong communication skills.
Nice to haves:
- LLMOps tooling: evals (Ragas, DeepEval), observability (LangSmith, Arize Phoenix), guardrails (NeMo).
- Cloud deployment of AI services (AWS preferred).
- GraphRAG or knowledge graph integration (Neo4j/FalkorDB).
- ReAct, Plan-and-Solve, or multi-agent collaboration patterns.
Compensation Range: $140,000 - $160,000
Benefits: OfferUp offers a comprehensive compensation and benefits package, including health insurance, healthcare savings and spending accounts, retirement savings benefits (401(k) plan with match), basic and voluntary life insurance, disability benefits, and paid time off for sick leave, family and/or medical leave, vacation, and 12 company holidays.