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Founding Engineer / CTO at ZATAR AI

We are looking for a Founding Engineer / CTO to join a London-based ambient AI startup led by alumni from Stripe and Plaid. You will build a sophisticated product that provides sub-second intelligence during live calls, moving beyond the chat box to create a truly ambient user experience. This role offers £140k cash and founding equity for a technical leader ready to own everything from low-latency ML pipelines to the core architecture. If you're a high-agency builder who thrives on robust debate and relentless iteration, this is your chance to define the next generation of conversational AI.

Overview

Role overview

Join as a technical co-founder to build ambient AI that assists professionals during high-stakes conversations. You will tackle gnarly challenges like sub-second latency and intent forecasting while architecting an unobtrusive Electron-based UX. This is a 0-1 opportunity to define the engineering culture and technical foundation for a next-generation productivity platform.

Company

ZATAR AI

ZATAR AI

Ambient AI startup founded by ex-Stripe and ex-Plaid leadership

Responsibilities

What you will do

  • Architect and build the end-to-end product, from the low-latency ML infrastructure to the minimal-overhead Electron front-end.
  • Develop a rapidly queryable context layer that integrates cross-platform data to provide real-time relevance during live conversations.
  • Set the engineering culture and standards, balancing high-craftsmanship iteration with a relentless bias toward shipping and learning.

Candidate profile

Who this is a fit for

  • Proven experience shipping production software from 0-1, with a track record of building high-quality products end-to-end.
  • Deep technical expertise in at least one core area: retrieval/graph data structures, voice/transcription pipelines, or ML infrastructure.
  • High-agency operator with a bias for action who knows when to choose the right abstraction and when to ship a duct-tape version.

What makes it remarkable

Why this role is remarkable

  • Leadership pedigree: Work directly with founders from Stripe, Google Pay, and Plaid who understand how to scale world-class products.
  • Deep technical ownership: You aren't just building features; you are making foundational architectural decisions on low-latency inference and real-time transcription pipelines.
  • High-impact product: Build "calm tech" that moves beyond the chat box, providing sub-second intelligence that respects user attention during live calls.

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Jill
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