Senior Frontend Engineer - React + TypeScript for AI UI

Doist; San Francisco (CA); On-site; 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 is seeking an experienced frontend engineer to develop and enhance features on LangSmith, our enterprise platform for LLM observability, testing, and debugging.

In this role, you will work on user-facing features, wireframes, and components, collaborating with cross-functional teams. The position is in-person 5 days/week in San Francisco, with additional sites in New York and Boston, and offers a competitive package.

Qualifications

• Extensive front-end engineering experience with React, JavaScript and TypeScript.
• Hands-on experience with front-end development tools like Babel, Vite, Webpack, NPM, and Yarn.
• Familiarity with REST APIs and collaboration with fullstack and backend engineers.
• Knowledge of modern authorization mechanisms, such as JWTs.
• A passion for user experience and building clean, intuitive interfaces.
• Strong written and oral communication skills for technical and non-technical stakeholders.
• Startup mindset and ownership—self-driven with opportunities to impact the company.

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 devices and browsers.
• Collaborate with fullstack/backend developers and UX/UI designers to enhance usability.

Skills

React

JavaScript

TypeScript

REST APIs

JWTs

UI/UX

Communication

CS fundamentals

Education

Bachelor's degree in Computer Science or related field

Tools

Babel

Vite

Webpack

NPM

Yarn

Job description

LangChain is seeking an experienced frontend engineer to develop and enhance features on LangSmith, our enterprise platform for LLM observability, testing, and debugging.

In this role, you will work on user-facing features, wireframes, and components, collaborating with cross-functional teams. The position is in-person 5 days/week in San Francisco, with additional sites in New York and Boston, and offers a competitive package.