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Senior Backend Software Engineer, AI Observability & Evals Platform (LangSmith)

San Francisco, CA💼 Full-time💰 $175,000–$175,000🗓 2026-01-08 → 2026-09-27

Core

Building backend systems for LangChain's observability and evaluation platform to monitor and evaluate AI applications at scale.

Role type

Senior Backend Software Engineer (AI Observability & Evals Platform)

Builds

Core services for tracing, monitoring, and evaluation workflows within LangSmith

Domain

AI/LLM infrastructure, Observability, Evaluation

Deliverable

production ML models | product features

Required skills

Backend engineering, API design, High-throughput systems, Performance optimization, Database systems (Postgres, Redis, Clickhouse), Cloud platforms (AWS, GCP, Azure)

Preferred skills

Fullstack engineering, Frontend engineering, Debugging production issues

Technologies

Python, Go, Postgres, Redis, Clickhouse, AWS, GCP, Azure

Responsibilities

Design and maintain backend services and APIs, Optimize storage and query performance, Ensure system reliability through testing and monitoring, Troubleshoot production issues, Create technical documentation, Collaborate on architectural decisions

Seniority

Senior, hands-on IC

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