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Senior Fullstack Engineer, AI Observability & Evals Platform
LangChainBoston, NY · full time · 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
Senior fullstack engineer role building LangSmith, an AI observability and evaluation platform used by major enterprises. This position suits experienced engineers who want to shape product architecture across Go, Python, and TypeScript while mentoring teammates and engaging directly with customers.
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 building complex platform products
- Fullstack experience with Go or Python backend and React + TypeScript frontend
- Strong PostgreSQL and Redis knowledge
- API design and scaling experience in high-performance, data-intensive systems
- Shipping velocity and iteration mindset
- Cross-functional collaboration and stakeholder communication
- Ownership-driven approach
Nice to have
- AI/LLM application experience
- Developer tools platform experience
- Observability platform experience