Job Details

Full-Stack Engineer

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.