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# Frontend Engineer, AI Observability & Evals Platform

- **Company:** Langchain, Inc
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Salary:** $175,000.0 - $240,000.0
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Design of User Interfaces, TypeScript, Website Wireframe, Apache Yarn, Backend, Webpack, Information Technology, Npm(Software), Front End Software Development, Restful APIs
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/senior-frontend-engineer-ai-observability-evals-platform-langchain-7807229

## About the Role

* 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
 * 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. Views unstructured environments as an opportunity to figure out the most impactful work and help define the future success of the company
 * An ownership mind-set. You are self-driven and look for opportunities to make an impact.
 * Strong computer science fundamentals, ideally with a degree in computer science or related field

## Description

(In person 5 days/week in San Francisco, CA, New York, Boston ), * 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


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