About Thirdlayer
Continual learning for enterprise AI. Backed by Y Combinator.
About the role
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.
What they're looking for
- 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
More about this role
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.
- 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.
- 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.
- 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.
- Translating browser inputs (voice, keyboard and mouse inputs, tab changes, DOM) into actionable workflow graphs.
- Agentic systems that predict and...
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