We are looking for a Senior Backend Engineer to join us. In this role you will be building the backend systems that power LangChain’s observability and evals platform. You will work on the core services that allow developers to monitor and evaluate their AI applications at scale. While the focus is on backend feature development, familiarity with fullstack or frontend engineering, performance tuning, and debugging production issues would be extremely valuable.

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

Collaborate on architectural decisions to ensure systems are performant and maintainable.

Optimize storage and query performance for high-volume observability and evaluation data.

Ensure system reliability through strong testing, monitoring, and alerting practices.

Troubleshoot and resolve production issues, performing root-cause analysis and implementing long-term fixes.

Create and maintain technical documentation, including system design and API references.

Work closely with full-stack engineers, product managers, and product designers on rolling out new features.

What You'll Bring

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.

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

Responsibilities

Qualification

Required

Benefits

Company

Langchain

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