Senior Frontend Engineer, AI Observabilty Platform

The role

You will develop and enhance new features on LangSmith, an enterprise platform for LLM application observability, testing, and debugging. You will use React and TypeScript to build user-facing features and reusable components.

What you will do

• 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

Required qualifications

• 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
• 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

Nice to have

• 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 in the US
• meaningful equity

About the company

LangChain builds the foundation for agent engineering, helping developers move from prototypes to production-ready AI agents. The company offers a platform for building, evaluating, deploying, and operating agents at scale.