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Full-Stack Engineer Intern

Thirdlayer

San Francisco, CA, USInternshipPosted September 12, 2026

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. 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. …

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The rest of the description, the direct apply link, your match score, a tailored resume and the recruiters to message all come with internOS Pro. 3 days free, then $10/month. Cancel anytime.