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Developer Productivity

LangChain· Engineering
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San Francisco, CA, New York, NY$165k - $250kFull-timePosted 11mo ago

About the role

Software Engineer on the Infrastructure team focused on developer productivity across LangGraph Cloud/Platform and LangSmith, owning testing, quality, and reliability practices for Kubernetes-based services, APIs, and UI flows.

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 pull requests and release candidates; seed test data and run hermetic test suites
  • Shift quality earlier in CI/CD pipelines (GitHub Actions) through parallelization, caching, deterministic seeds, flake tracking, and quality gates
  • Build observability into testing workflows with rich failure artifacts such as logs, traces, and dashboards
  • Establish performance and reliability baselines for critical paths, including SLIs, SLOs, and regression detection
  • Partner on incident workflows by reproducing issues, adding targeted regression tests, and improving runbooks and postmortems
  • Write documentation including test plans, playbooks, and contributor guidelines for writing high-quality tests
  • Example projects you might own: - A PR ephemeral end-to-end testing harness deploying a minimal LangSmith stack in CI and running Playwright/API suites against seeded tenants - A k6 performance scenario simulating multi-tenant traffic and surface p95/p99 latency regressions per release - A flake-budget system that quarantines flaky tests, opens issues with artifacts, and tracks time-to-deflake

Qualifications

  • 3+ years of experience as a software engineer or infrastructure engineer
  • Strong hands-on experience with Python and testing frameworks such as pytest
  • Experience working 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

Skills

Required:PythonpytestCI/CDAPI testing

Benefits

  • Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.
Last updated Oct 14, 2026. Interested? Apply on the company site.

About LangChain

Engineer reliable agents

LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.

AI agentsagent engineeringbrex-fastest-growing-2025liquid-ai-recruiting-targetopen source frameworksplatform
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