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Full-Stack Engineer Intern

San Francisco•Internship•$30-60/hr

We're looking for engineers who can turn research prototypes into production-ready systems. You'll work at the intersection of browser automation, agent infrastructure, and intuitive UX that make complex agent behavior understandable and controllable.

Why you'll love ThirdLayer

  • Competitive Pay: We match top-tier internship salaries and bonuses.
  • Hacker House: Live and work in our central SF 3-story loft.
  • Impact: Work directly with founders to shape the product.

What You'll Build

  • Fullstack browser extension interfaces based on research prototypes.
  • End-to-end features using React/Next.js, Python, and SQL.
  • Beautiful and intuitive frontend systems.

Requirements

  • Strong foundation in React/Next.js and TypeScript.
  • Experience building and shipping complex web apps and/or browser extensions.
  • Familiarity with design systems like Figma or Framer.
  • Preferred: Proof of meaningful open-source contribution.
  • Preferred: Strong UI/UX or design portfolio.

Sample Projects

  • Reusable tool call and output components for LLM-generated responses.
  • Integrating user feedback mechanisms into agent output UI.
  • Developing dashboards to integrate apps and set up workflows.
  • Integrating third-party platforms (e.g. Slack, Notion, Gmail) to enable agent-initiated workflows.