Senior Frontend Platform Engineer, Design Systems

Job summary

Responsibilities

This role can be based remotely in the U.S. Ideally SF, NYC, or Boston.

• Build out LangChain’s component library
• Design and implement reusable, composable React components that are flexible, accessible, and production-ready
• Partner closely with designers to translate design systems, tokens, and interaction patterns into code
• Build reliable UI quality systems
• Develop design system tooling and improve workflows around theming, tokens, versioning, testing, and component discovery (e.g. Storybook)

What they're looking for

• Extensive experience building modular, composable, and well-documented component libraries and/or design systems
• Deep knowledge of React, TypeScript, HTML, and CSS, familiarity with: styling approaches (CSS Modules, CSS-in-JS, Tailwind, Sass, etc.) and design system toolings (Storybook…
• Experience collaborating closely with designers and non-engineering partners
• Strong attention to detail and a high bar for craft and genuine passion for accessibility and inclusive design
• Familiarity with testing UI components and visual regression testing

Tech stack

• LangGraph
• React
• TypeScript