Backend Engineer (LangGraph Platform)

About LangChain

LangChain was founded in early 2023 to help developers build context-aware reasoning applications. LangChain, open source software, is a framework that gives developers the building blocks to create production-ready applications with LLMs. LangSmith is our commercial, all-in-one SaaS platform that enables the end-to-end, development workflow for building LLM-powered apps. LangSmith is now trusted by the best teams building with LLMs, at companies such as Airbnb, ByteDance, Klarna, Google, Meta, Home Depot, and our 100+ paying enterprise customers.

Backed by some of the best venture capitalists, Benchmark and Sequoia, we have 10x’d our revenue last year and have big ambitions and are set up to build an enduring business.

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 LangGraph Platform 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 to support LangGraph Platform/LangGraph Cloud

• 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., Node.js, Python, Go, 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.

• familiarity with Kubernetes (K8s) for container orchestration and Terraform (Tf) for Infrastructure-as-Code.

• Knowledge of cloud platforms (AWS, GCP, Azure) and their managed services.

• Exposure to front-end technologies or full-stack development (React, Vue, etc.).

Compensation & Benefits

• Competitive salary and equity stake for role and stage of company. Commensurate with experience.

• Annual salary range: $145,000-$195,000 USD for Senior Engineers