Frontend Engineer, AI Observability & Evals Platform

LangChain / LangSmith
San Francisco, CA, USA / New York, NY, USA / Boston, MA, USA2026-08-12OnSite

About the job

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

Responsibilities

- 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

Qualifications

Minimum

- 2+ years of 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

- Knowledge of modern authorization mechanisms, such as JWTs

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

- Strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders

- The DNA to thrive in a start-up, fast-paced environment

- An ownership mind-set

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

Preferred

No preferred qualifications listed.