LangChain is looking for a Backend Engineer to join their LangSmith team to design and build the backend systems that power LangChain's observability and evals platform, enabling developers to monitor and evaluate their AI applications at scale.
Requirements
- 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)
Responsibilities
- 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.
Other
- In person 5 days/week in San Francisco, CA or New York, NY
- 3+ years of professional experience in backend engineering
- Strong communication skills, with the ability to collaborate cross-functionally
- Customer centricity and ownership mentality
