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Frontend Engineer, AI Observability & Evals Platform

About UsAt LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We be

Company

LangChain

Location

San Francisco, CA; Boston, MA; New York, NY

Status

Open

Posted

2026-08-12T01:29:10.739+00:00

LangChain is hiring a frontend engineer to build new features on LangSmith, its platform for LLM application observability, testing, and debugging. The work covers React and TypeScript features, reusable components and front-end libraries, performance across browsers, and collaboration with fullstack engineers and UX designers. The posting asks for 2+ years of frontend experience, JavaScript and TypeScript proficiency, front-end build tools such as Vite or Webpack, REST API familiarity, and JWT authorization knowledge. The role is based in San Francisco, New York, or Boston, with in-office work five days a week.