Join ZATAR AI as a Founding Engineer/CTO to build a sub-second latency ambient AI product from the ground up. You will own the technical architecture—from low-latency inference systems to a minimalist Electron interface—defining the product's future alongside founders with pedigree from Google, Stripe, and Plaid in a high-velocity, London-based environment.
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Founding Engineer / CTO at ZATAR AI
Join ZATAR AI as a Founding Engineer / CTO and build the future of ambient AI alongside founders from Stripe and Plaid. You'll solve gnarly technical challenges like sub-second inference and real-time context retrieval to help professionals ace high-stakes conversations. This is a rare 0-1 opportunity for a high-agency builder to own the technical roadmap, ship a 'calm tech' product end-to-end, and define the engineering culture of a London-based startup. With £140k cash and significant founding equity, you'll be at the heart of a relentless, high-craft team building something truly unique.
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Location
London, United Kingdom
Compensation
£140k + Equity
Company
ZATAR AI
Role overview
Ambient AI for high stakes conversations.
What you will do
- Architect and build the end-to-end product, including a low-overhead Electron surface and the high-performance systems running underneath.
- Develop and optimize low-latency inference models and conversational intelligence pipelines to forecast intent and emotional shifts during live calls.
- Design and maintain a rapidly queryable context layer that synthesizes data from CRMs and documents to provide real-time, relevant assists.
Who this is a fit for
- Proven track record of shipping 0-1 production software, with deep expertise in retrieval, graph data structures, or voice/transcription pipelines.
- High-agency builder who makes sharp architectural decisions with imperfect information and prioritizes product velocity without sacrificing high craftsmanship.
- Technical leader with low ego who thrives in a collaborative, high-debate environment and values the intensity of a hybrid, 3 days/week office culture.
Why this role is remarkable
- Build the technical foundation of a company led by founders with senior backgrounds at Stripe, Google Pay, JPMorgan, and Plaid.
- Solve deep technical challenges in real-time "calm tech," moving beyond standard chat boxes to innovate with sub-second latency ambient intelligence.
- Secure a significant founding equity stake and the authority to shape the engineering culture and product roadmap from day zero.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and ZATAR AI wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.