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Senior Frontend Platform Engineer, Design Systems

Langchain 🇺🇸 Cambridge, Massachusetts, United States

$170,000 - $195,000 Full-time Senior

Build and own LangChain's component library by designing reusable, accessible React components. Partner with designers to translate design tokens and interaction patterns into a scalable UI foundation.

Responsibilities

  • Build and own LangChain's component library by designing reusable, accessible React components. Partner with designers to translate design tokens and interaction patterns into a scalable UI foundation.

Requirements

  • Requires deep expertise in React, TypeScript, and modern CSS styling approaches along with experience building modular component libraries. Candidates must have a high bar for craft, a passion for inclusive design, and experience with UI testing tools.

Benefits

  • Medical coverage
  • Dental coverage
  • Vision coverage
  • Flexible vacation
  • 401(k) plan
  • Life insurance
  • Equity
  • Meals on in-office days

Key Skills

React TypeScript CSS-in-JS Styled Components Design tokens Component library development Accessibility (WCAG) Storybook UI testing Jest React Testing Library Responsive design Cross‑browser compatibility Design system implementation Collaboration with designers Version control (Git) Continuous integration Agile development Code review Performance optimization Documentation Problem solving Mentoring junior engineers Inclusive design

About Langchain

At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. What began as widely adopted open-source tools has grown into a platform for building, evaluating, deploying, and operating agents at scale. LangChain provides the agent engineering platform and open source frameworks developers need to ship reliable agents fast. LangSmith offers observability, evaluation, and deployment for rapid iteration. Our open source frameworks, LangGraph, LangChain, and Deep Agents, help developers build agents with speed and granular control. LangSmith is trusted by leading AI teams at Zip, Vanta, Klarna, Workday, Linkedin, Cloudflare, and more.

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