Thirdlayer logo

Founding Engineer

Thirdlayer

San Francisco, CAFull-timeSeen 1mo agoStill listed 2 days ago

Evaluate my fit

Most applications go out cold — see where you stand first. No sign-up to start.

Watch jobs like this.

Don't just apply. Show up ready.

Olive works from this exact posting.

At a glance

Compensation
No compensation found
Location
San Francisco, CA
Schedule
Full-time
Work Authorization
Not specified

Olive lists jobs from US employers, including remote roles you can work from the United States.

Job overview

Thirdlayer is building a personalized AI action layer that operates across all user workflows, embedding a real-time collaborative partner directly into the browser. The role involves creating core agent components, high‑performance state management, and scalable infrastructure to enable browser‑native AI experiences.

Skills & qualifications

RequiredNice to have

Skills

PythonReactTypeScriptNatural Language ProcessingReact/Next.jsDeep Browser InternalsAI/ML Infra

Full job description

We're creating the third layer of interaction — a personalized AI action layer that lives across all your workflows. If that excites you, and you’re a world-class infrastructure expert, please apply. Why Dex Matters

  • Flow is everything. Every tab switch, every UI reload, every wait for an AI handoff kills momentum.
  • The future of productivity is collaborative AI. Dex is an active, real-time partner embedded directly in your browser—the place where your work actually lives.
  • Context makes or breaks a product. You need systems that understand where you are, what you're doing, and what should happen next.

What You'll Build

  • Core agent components, including memory stores, context compression, inter-agent protocols, planning and tool use.
  • High performance state management and real-time UI observation systems.
  • Scalable infrastructure for browser-native AI.

Requirements

  • Expert in React/Next.js, TypeScript, and Python.
  • Deep browser internals experience.
  • Proven rapid prototype to production track record.
  • Preferred: Prior experience with AI/ML infra or agentic systems.

Sample Projects

  • Translating browser inputs (voice, keyboard and mouse inputs, tab changes, DOM) into actionable workflow graphs.
  • Agentic systems that predict and execute users’ next steps in complex workflows.
  • A searchable, self-updating memory store for personalized user flow paths.

Similar jobs, posted recently

Open roles like this one, listed in the last 30 days.

You've read the whole posting — now see how you match it.

Evaluate my fit