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

Boston, MA💼 Full-time💰 $180,000–$180,000🗓 2026-09-12 → 2026-09-26

Core

Building backend systems for LangSmith, a platform for observability, evaluation, and production reliability of AI agents.

Role type

Senior Backend Software Engineer

Builds

Core services for tracing, monitoring, and evaluation workflows for AI applications

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, Cloud platforms

Preferred skills

Python, Go, 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 feature rollouts

Seniority

Senior, hands-on IC

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