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FullStack Engineer, AI Observability & Evals Platform (LangSmith)

LangChain

Boston, NY · full time · Mid

$145,000 – $180,000

Listed on LangChain’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

This fullstack role involves building features for LangSmith, an observability and evaluation platform for AI applications. You'll work across a Go/Python backend and React/TypeScript frontend, collaborating with product teams and enterprise customers to ship features quickly and iterate based on feedback.

Our summary, not LangChain’s wording. The full posting is on their site.

Skills this role names

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What they ask for

Required

  • 2+ years building complex platform products
  • Fullstack experience with Go or Python backend and React + TypeScript frontend
  • Understanding of Postgres and Redis
  • Experience designing and scaling APIs in data-intensive applications
  • Ownership mindset and ability to ship quickly and iterate

Nice to have

  • Experience with AI/LLM applications
  • Developer tools background
  • Observability platform experience

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