Platform Reliability Engineer: Boost Developer Productivity

LangChain; San Francisco (CA); On-site; USD 175,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, vision coverage

401(k) plan

In-office meals

Job summary

LangChain is hiring a Software Engineer to join the Infrastructure team and own developer productivity across LangGraph Cloud/Platform and LangSmith products. You’ll work closely with Infrastructure, Backend, and Frontend teams to ship with confidence across Kubernetes-based services, APIs, and UI flows, and help pioneer quality practices specific to LLM applications.

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

Qualifications

• 3+ years of experience as a software engineer or infrastructure engineer.
• Strong Python programming and testing with pytest.
• Experience with CI/CD systems (GitHub Actions preferred) and improving pipeline performance and reliability.
• Solid understanding of API testing, mocking/stubbing, and data setup/teardown.
• Comfort defining quality standards, writing test plans, and driving cross-team execution.

Responsibilities

• Own test strategy end-to-end across APIs, services, UI, data, and infrastructure (Kubernetes, Terraform, Helm).
• Stand up ephemeral test environments in Kubernetes for PRs and releases; seed test data and run hermetic test suites.
• Shift quality earlier in CI/CD pipelines through parallelization, caching, deterministic seeds, flake tracking, and quality gates.
• Build observability into testing workflows with logs, traces, and dashboards.
• Establish performance and reliability baselines for critical paths (SLIs/SLOs).
• Partner on incident workflows by reproducing issues, adding regression tests, and improving runbooks/postmortems.
• Write documentation including test plans, playbooks, and contributor guidelines.

Skills

Python

pytest

CI/CD (GitHub Actions)

API testing

Test data setup/teardown

Tools

Kubernetes

Terraform

Helm

PostgreSQL

Job description

LangChain is hiring a Software Engineer to join the Infrastructure team and own developer productivity across LangGraph Cloud/Platform and LangSmith products. You’ll work closely with Infrastructure, Backend, and Frontend teams to ship with confidence across Kubernetes-based services, APIs, and UI flows, and help pioneer quality practices specific to LLM applications.

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