About the company
- LangChain builds the foundation for agent engineering, helping developers move from prototypes to production-ready AI agents.
- $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures.
- Platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, Sandboxes), open source frameworks (LangChain, LangGraph, Deep Agents), and LangSmith Engine.
- 100M+ monthly open source downloads, 6,000+ active LangSmith customers.
About the team
The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems, end-to-end.
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.
Requirements
- 4+ years of professional experience in backend engineering working on highly complex products.
- Proficiency in one or more backend languages/frameworks, ideally Python and/or Go.
- Strong understanding of API design and building reliable data services.
- Experience with high-throughput, 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) is a bonus.
- Strong communication skills, customer centricity and ownership mentality.
Conditions
- This role is based onsite in Boston, MA.
- Annual salary range: $180,000 - $240,000.
- Compensation includes base salary, variable compensation, meaningful equity, benefits, and perks.
- Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US.