Senior Frontend Engineer, AI Observability & Evals Platform

$175k - $240k San Francisco, CA FullTime

Posted 1mo ago

Job Location

San Francisco, CA

Tech Stack

Remote Work Policy

On-site

Employment Type

FullTime

Categories

AI Infrastructure Engineer

About the job

LangChain is seeking an experienced frontend engineer to develop and enhance new features on LangSmith, their enterprise platform product for LLM application observability, testing, and debugging. This role is crucial for building the foundation of agent engineering in the real world, helping developers move from prototypes to production-ready AI agents. The company has a strong financial backing and a rapidly growing user base, offering team members a significant impact on shaping the future of AI technology.

Responsibilities

  • Develop new user-facing features using React and 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 various devices and browsers.
  • Collaborate with fullstack and backend developers and UX/UI designers to enhance usability.

Requirements

  • 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.
  • Ability to thrive in a fast-paced startup environment.
  • An ownership mindset and self-driven approach.
  • Strong computer science fundamentals, ideally with a degree in computer science or related field.

Benefits

  • Medical, dental, and vision coverage
  • Flexible vacation
  • 401(k) plan
  • Meals on in-office days
  • Meaningful equity
  • Variable compensation

About Langchain

Get new AI jobs in your inbox

A weekly digest of the newest AI engineering roles.

© 2026 AI Job Board. All rights reserved.