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Senior Frontend Platform Engineer

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Senior Frontend Platform Engineer in USA

  • LangChain
  • Full time
  • Email
  • Boston, MA

Responsibilities

  • Build and own LangChain’s component library.
  • Design and implement reusable, composable, accessible, production-ready React components.
  • Translate design systems, tokens, and interaction patterns into code in partnership with designers.
  • Develop tooling and workflows for theming, tokens, versioning, testing, and component discovery.
  • Make architectural decisions supporting accessibility, performance, consistency, and maintainability.
  • Improve UI build and test workflows, including bundling performance and package versioning.
  • Maintain testing and dependency-management tooling for the UI application.

Requirements

  • Strong experience building modular, composable, and well-documented component libraries or design systems.
  • Deep knowledge of React, TypeScript, HTML, and CSS.
  • Familiarity with CSS Modules, CSS-in-JS, Tailwind, Sass, Storybook, Chromatic, and token pipelines.
  • Experience collaborating closely with designers and non-engineering partners.
  • Strong attention to detail and commitment to accessibility and inclusive design.
  • Familiarity with UI component testing and visual regression testing.

Benefits

  • Medical, dental, and vision coverage.
  • Flexible vacation.
  • 401(k) plan and life insurance.
  • Meals on in-office days in the US.
  • Meaningful equity, variable compensation where relevant, and other perks.
  • EU, UK, and APAC team members receive locally competitive benefits aligned with regional norms and regulations.

Salary: $170k - $195k/yr

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 platfo...

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