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Developer Productivity Engineer

LangChainSan Francisco, CA
On-site Full-time $160K/yr - $225K/yr

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Experience Level

Experience

Qualifications

Qualifications:Proficiency in software development and testing methodologies. Experience with Kubernetes, CI/CD tools, and API development. Strong understanding of LLM applications and quality assurance practices. Ability to collaborate across teams and communicate effectively. Passion for enhancing developer experience and productivity.

About the job

About LangChain

At LangChain, we are driven by our vision to make intelligent agents a fundamental part of everyday life. We lay the groundwork for agent engineering, guiding developers from initial prototypes to production-ready AI agents that organizations can trust. Initially recognized for our extensive open-source tools, we have since evolved to provide a robust platform for building, assessing, deploying, and managing agents at scale.

Today, our products, including LangChain, LangGraph, LangSmith, and Agent Builder, are instrumental for teams delivering cutting-edge AI solutions in both startups and large corporations. Millions of developers rely on LangChain to enhance AI capabilities at notable firms such as Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, and Vanta, along with 35% of the Fortune 500.

With $125 million raised in our Series B funding from leading investors like IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we are in an exciting phase of growth, continuously innovating our product offerings. Every team member plays a significant role in shaping our technology and collaborative culture at LangChain.

Role Overview

Work on-site five days a week in San Francisco, CA or New York, NY

We are seeking a Software Engineer to join our Infrastructure team, focusing on enhancing developer productivity for our LangGraph Cloud/Platform and LangSmith products. You will collaborate closely with Infra, Backend, and Frontend teams to confidently deliver across Kubernetes-based services, APIs, and UI flows. Additionally, you will help establish quality practices tailored to LLM applications, such as prompt regressions and evaluation suites.

  • Develop and manage test strategies across APIs, services, UI, data, and infrastructure (K8s/Terraform/Helm).

  • Create ephemeral test environments in Kubernetes for pull requests and release candidates; generate test data and execute hermetic suites.

  • Advance quality in CI/CD (GitHub Actions): implementing parallelization, caching, deterministic seeds, flake tracking, and quality gates.

  • Enhance test observability: provide rich failure artifacts (videos, logs, traces), Datadog dashboards, and actionable alerts.

  • Ensure performance & reliability: establish baseline SLIs/SLOs for critical paths; conduct capacity tests and regression detection.

  • Collaborate on incident workflows: troubleshoot issues, implement targeted regression tests, and refine runbooks/processes.

About LangChain

LangChain is at the forefront of intelligent agent technology, empowering developers to create reliable AI solutions. Our commitment to innovation and quality drives our success across various industries and organizations. We believe in fostering a collaborative and impactful work environment for our team members.

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