Senior Backend Engineer (AI)

Company

LangChain is a leading platform for building, evaluating, and deploying AI agents, providing the foundation for agent engineering with widely adopted open-source tools and a robust production platform.

What you will do

• Design and operate high-throughput, data-intensive ingestion and trace-query systems.
• Define and enforce standards for SDK generation across Python, TypeScript, Go, and Java.
• Build and maintain integrations to ensure LangSmith remains framework-agnostic.
• Debug performance bottlenecks and architect solutions for distributed-system challenges.
• Participate in an on-call rotation focused on incident prevention and system resilience.

Requirements

• Location: Must be based in or able to work from San Francisco, CA or New York, NY.
• Hands-on experience designing and running data-intensive systems at scale.
• Strong backend software engineering skills with production-level experience in Go, Python, or TypeScript.
• Production experience with OSS datastores like PostgreSQL and Redis.
• Solid knowledge of cloud infrastructure, Kubernetes, and containerized environments.
• Track record of building high-quality, developer-facing APIs or SDKs.

Nice to have

• Strong experience with Java.
• Knowledge of columnar file formats and OLAP databases.
• Background in high-growth startups.

Culture & Benefits

• Competitive compensation including base salary and meaningful equity.
• Comprehensive health, dental, and vision coverage.
• 401(k) plan and life insurance.
• Flexible vacation policy.
• Provided meals on in-office days.