Senior Frontend Engineer — React/TypeScript Observability

LangChain, Inc.; San Francisco, Northern (CA, KY); Hybrid; USD 175,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

Flexible vacation

401(k) plan

Meals on in-office days in the US

Job summary

LangChain, Inc. in San Francisco seeks an experienced frontend engineer to advance LangSmith, our enterprise platform for LLM observability, testing, and debugging.

This role is in-person 5 days a week in San Francisco, with ongoing collaboration across NY and Boston teams. You will build with React and TypeScript, create reusable components, optimize performance, and work closely with backend and UX teams to deliver intuitive interfaces for complex workflows within a startup-friendly

Qualifications

• Extensive frontend experience with React, TypeScript, and JavaScript.
• Experience building user-facing features and reusable components.
• Familiarity with REST APIs and modern auth mechanisms (JWT).
• Strong problem-solving and communication skills.

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 performance across devices and browsers.
• Collaborate with backend and UX teams to improve usability.

Skills

React

TypeScript

JavaScript

REST APIs

JWTs

Strong communication

CS fundamentals

Startup mindset

Education

Bachelor's degree in Computer Science or related field

Tools

Babel

Vite

Webpack

NPM

Yarn

Job description

LangChain, Inc. in San Francisco seeks an experienced frontend engineer to advance LangSmith, our enterprise platform for LLM observability, testing, and debugging.

This role is in-person 5 days a week in San Francisco, with ongoing collaboration across NY and Boston teams. You will build with React and TypeScript, create reusable components, optimize performance, and work closely with backend and UX teams to deliver intuitive interfaces for complex workflows within a startup-friendly