LangChain
FullStack Engineer, AI Observability & Evals Platform (LangSmith)
$145K–$180K
San Francisco, CA · On-site · Full-time · Posted Oct 14, 2026
- Experience
- 2+ years.
About the job
Build features for LangSmith, an AI observability and evaluation platform, collaborating with customers and internal teams.
What you'll do
- Develop product features across the Go, Python, and TypeScript stack.
- Work with product and design teams to iterate on features and the roadmap.
- Deliver projects to tight timelines while maintaining clean, tested, and maintainable code.
What they ask for
- 2+ years of software engineering experience working on complex platform products.
- Full-stack experience with Go or Python on the backend and React + TypeScript on the frontend.
- Solid understanding of database systems, particularly Postgres and Redis.
- Experience designing and scaling APIs.
Nice to have
- Experience with AI/LLM-powered applications, developer tools, or observability platforms.
Pay
$145,000-180,000 USD (base salary)
Tools
Go, Python, Typescript, React, Postgres, Redis
AI focus
Build and develop features for an AI observability and evaluation platform.
Model-written summary · the original posting is authoritative