Platform Reliability Engineer: Developer Productivity

LangChain; New York (NY); On-site; USD 175,000 - 240,000; Full time

Benefits offered by this job

Medical, Dental, Vision

401(k) Plan

In-office Meals

Flexible Vacation

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.

You’ll help pioneer quality practices for LLM applications, such as prompt regression testing, evaluation suites, and test plans.

Qualifications

• 3+ years of software or infrastructure engineering experience.
• Strong Python and testing experience with pytest.
• Experience with CI/CD systems, preferably GitHub Actions.
• Solid understanding of API testing, mocking, and data setup/teardown.
• Ability to define quality standards and drive 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 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.

Skills

Python

pytest

CI/CD (GitHub Actions)

API testing

Data setup/teardown

Quality standards

Tools

Kubernetes

Terraform

Helm

Datadog

OpenTelemetry

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.

You’ll help pioneer quality practices for LLM applications, such as prompt regression testing, evaluation suites, and test plans.