Frontend Engineer joining AI startup, developing React software for generative AI products. Collaborating with tech teams on user - friendly interfaces and robust design systems.
About the role
- AI Engineer on the Data team at OfferUp transforming marketplace data into AI-powered solutions driving user engagement.
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
- Deliver the next generation of Search, Personalization, and Trust & Safety features powered by reliable, production-quality AI systems
- Directly contribute to key business KPIs (conversion, retention, fraud reduction) by turning data science insights into shipped capabilities
- Production RAG pipelines for intelligent discovery; agentic workflows for marketplace automation; tooling and infrastructure for rapid, safe LLM deployment
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.
Benefits
- health insurance
- healthcare savings and spending accounts
- retirement savings benefits (401(k) plan with match)
- basic and voluntary life insurance
- disability benefits
- paid time off for sick leave, family and/or medical leave, vacation, and 12 company holidays
- flexible vacation policy
Job title
Job type
Experience level
Salary
Degree requirement
Tech skills
Location requirements
Frontend Developer creating engaging web interfaces using React and Next.js for digital commerce. Collaborating with UX/UI designers and backend teams to deliver modern web applications.
Frontend Engineer responsible for evolving shared frontend components and improving developer experience in fintech company. Building and maintaining design standards, collaborating with product teams for extensive impact.
Join the team as Frontend React Senior at knowmad mood, enhancing collaborative tech projects in a dynamic environment.
Join knowmad mood as Frontend React Senior to develop applications in a collaborative environment. Contribute to innovative projects and follow solid design practices in Palma de Mallorca.
Join knowmad mood as a Frontend React Senior. Contribute to a collaborative, innovative tech environment in Sevilla.
Senior Front - End Development Engineer developing new applications and features for media services company. Collaborating with teams to create and optimize scalable applications in a hybrid work environment.
Senior Full Stack Web Developer at SiteOwl, building innovative applications for physical security management using modern technologies.
Director of Web Engineering at Genesys overseeing enterprise web platform strategy and execution. Enhancing user experience, driving growth, and leading engineering teams.
Frontend Developer React Senior desarrollando interfaces modernas usando React y asegurando estándares de calidad. Colaborando con el equipo en un ambiente ágil y desafiador.