Backend Engineer (LangSmith Deployment)

About LangChain

At LangChain, our mission is to make intelligent agents ubiquitous. We provide the agent engineering platform and open source frameworks developers need to ship reliable agents fast.

Our open source frameworks, LangChain and LangGraph, see over 90+ million downloads per month and help developers build agents with speed and granular control. LangSmith offers observability, evaluation, and deployment for rapid iteration, enabling teams to transform LLM systems into dependable production experiences.

LangChain is trusted by millions of developers worldwide and powers AI teams at companies like Replit, Clay, Cloudflare, Harvey, Rippling, Vanta, Workday, and more.

About the role

In person 5 days/week in San Francisco, CA or New York, NY

We are looking for a Senior Backend Engineer to join our LangSmith Deployment team. In this role, you will be responsible for designing and building backend services that power our platform at scale. While the focus is on backend development, strong familiarity with Kubernetes (K8s), Terraform (Tf), and other DevOps tooling is highly preferred.

• Design, develop, and maintain backend services and APIs
• Implement best practices for performance, security, and maintainability.
• Collaborate on architectural decisions, ensuring solutions are scalable and robust.
• Evaluate and optimize application performance, identifying bottlenecks and designing solutions to handle large-scale workloads.
• Implement application monitoring, logging, and alerting solutions to ensure system health.
• Participate in on-call rotations or provide escalated support when required, troubleshooting production issues and performing root-cause analysis.
• Create and maintain technical documentation, including system design and operational runbooks.
• Proactively identify areas for improvement within codebases, processes, and team workflows, driving initiatives from concept to completion.

How to be successful in this role

• 5+ years of professional experience in backend engineering or a related role.
• Proficiency in one or more backend languages/frameworks (e.g., Go, Python, nodejs, etc.).
• Experience with RESTful APIs and building high-traffic or mission-critical systems.
• Demonstrated ability to debug, troubleshoot, and optimize backend services.
• Strong communication skills, with the ability to work cross-functionally and self-manage tasks effectively.
• Hands-on experience with distributed systems and microservices architectures.
• Knowledge of cloud platforms (AWS, GCP, Azure) and their managed services.

Compensation & Benefits

• We offer competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance. Actual compensation will vary based on role, level, and location. For team members in the EU and UK, we provide locally competitive benefits aligned with regional norms and regulations.
• Annual salary range: $145,000-$195,000 USD for Senior Engineers