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

LangChain· Engineering
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New York, NY$180k - $240kFull-timePosted 1w ago

About the role

Senior Backend Engineer to build LangSmith’s observability, evaluation, and production reliability platform, focusing on backend services and APIs to support tracing, monitoring, and evaluation workflows at scale.

Responsibilities

  • Design, develop, and maintain backend services and APIs to support LangSmith’s tracing, monitoring, and evaluation workflows.

Qualifications

  • 5+ years of professional experience in backend engineering working on highly complex products
  • Proficiency in one or more backend languages/frameworks, ideally Python or Go
  • Strong understanding of API design and building reliable data services
  • Experience with high-throughput or mission-critical systems
  • Demonstrated ability to optimize backend services for performance and reliability
  • Experience with database systems (Postgres, Redis, Clickhouse), and cloud platforms (AWS, GCP, Azure)
  • Strong communication skills, with the ability to collaborate cross-functionally
  • Customer centricity and ownership mentality

Skills

Required:Backend developmentAPI designPython or Go

Benefits

  • Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.
Last updated Oct 14, 2026. Interested? Apply on the company site.

About LangChain

Engineer reliable agents

LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.

AI agentsagent engineeringbrex-fastest-growing-2025liquid-ai-recruiting-targetopen source frameworksplatform
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