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FullStack Engineer, AI Observability & Evals Platform (LangSmith)

San Francisco, CA💼 Full-time💰 $145,000–$180,000🗓 2025-08-15 → 2026-09-26

Core

Build new features and functionality for LangSmith, a commercial AI observability and evaluation platform serving enterprise customers and developer end-users.

Role type

Fullstack engineer (Go/Python backend, React/TypeScript frontend)

Builds

AI observability, evaluation, and deployment features for the LangSmith platform

Domain

AI/LLM infrastructure, developer tools, observability

Deliverable

product features

Required skills

Go, Python, React, TypeScript, Postgres, Redis, API design, scaling high-performance systems

Preferred skills

AI/LLM-powered applications, developer tools, observability platforms

Responsibilities

Develop and implement key product features across the full stack; Collaborate with product and design teams to iterate on new features; Drive project timelines while maintaining high engineering standards

Seniority

Mid-level, hands-on IC

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