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Research Engineer, LangSmith Engine

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

New York, NY; San Francisco, CA

Status

Open

Posted

2026-08-14T17:40:43.334+00:00

LangChain is hiring a research engineer for the LangSmith Engine team, which builds an agent that inspects production traces, finds failures in other agents, and proposes fixes. The work is building benchmarks and evaluations, running experiments across models, prompting, context, tools and orchestration, and trying fine-tuning and post-training, then moving what works into production while tracking cost, latency and reliability. The posting asks for 4+ years in ML/AI research, a master's or PhD, LLM and agent experience, and strong software engineering; it also mentions setting the ML roadmap and mentoring.