Senior Front-End Engineering

We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.

With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world.

Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater.

The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems. If you want to define what great AI observability looks like at production scale, this is where that work gets done.

We’re looking to bring on an experienced frontend engineer to develop and enhance new features on LangSmith, our enterprise platform product for LLM application observability, testing, and debugging.

Develop new user-facing features using React & Typescript

Build reusable components and front-end libraries for future use

Translate designs and wireframes into high-quality code

Optimize components for maximum performance across a vast array of web-capable devices and browsers

Collaborate with fullstack and backend developers and UX/UI designers, to enhance usability

Extensive front-end engineering experience with strong proficiency in React, JavaScript and TypeScript

Hands-on experience with front-end development tools like Babel, Vite, Webpack, NPM, and Yarn

Familiarity with REST APIs and experience working closely with fullstack and backend engineers

A passion for user experience, design and building clean, engaging, and intuitive interfaces

Views unstructured environments as an opportunity to figure out the most impactful work and help define the future success of the company

Strong computer science fundamentals, ideally with a degree in computer science or related field

We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.

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