Developer Productivity

About this role

LangChain is seeking a Software Engineer to join the Infrastructure team and own developer productivity and quality practices across LangGraph Cloud and LangSmith. You'll design and implement comprehensive testing strategies, CI/CD improvements, and observability solutions for Kubernetes-based services and AI applications.

What you'll do

• Own end-to-end test strategy across APIs, services, UI, data, and infrastructure
• Build ephemeral test environments in Kubernetes for pull requests and release candidates
• Optimize CI/CD pipelines through parallelization, caching, and quality gates
• Establish performance and reliability baselines with SLIs, SLOs, and regression detection
• Partner on incident response by reproducing issues and adding regression tests
• Pioneer quality practices for LLM applications including prompt regression testing and evaluation suites

What they're looking for

• Python and pytest
• CI/CD systems (GitHub Actions)
• API testing and mocking/stubbing
• Kubernetes and containerized environments
• Performance testing tools (k6)
• Observability and monitoring
• Infrastructure as code (Terraform, Helm)
• Test planning and cross-team communication