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Senior Fullstack Software Engineer, AI Observability & Evals Platform (NY)

LangChain

San Francisco, CA · Senior

$175,000 – $240,000

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

What this role is

LangChain is hiring a senior fullstack engineer to build features for LangSmith, their observability and evaluation platform for AI agents. You'll work across Go, Python, and TypeScript while mentoring junior engineers and engaging directly with enterprise customers on a product used by Fortune 500 companies.

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

  • 5+ years of software engineering experience
  • Fullstack engineering with Go or Python backend and React/TypeScript frontend
  • Strong understanding of PostgreSQL and Redis
  • Experience designing and scaling APIs for high-performance applications
  • Ability to ship fast and iterate based on feedback
  • Cross-functional collaboration skills

Nice to have

  • Experience with AI/LLM-powered applications
  • Developer tools experience
  • Observability platforms experience

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