As the Founding AI Engineer, you will own the end-to-end development of production AI systems. Moving beyond prototypes, you will build and scale customer-facing features within a lean, high-velocity team. This role offers total ownership of ambiguous product surfaces, requiring a blend of technical depth and product-centric engineering to drive impact.
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Founding AI Engineer at seed-stage product-led AI startup
We are seeking a Founding AI Engineer to join a well-funded, seed-stage AI startup in London. This isn't a research role; it's a call for a builder who can ship production-grade AI systems and own major product surfaces from day one. If you thrive in tiny, high-velocity teams and want to move beyond prototyping to building real-world, customer-facing intelligence, this is the career-defining opportunity you've been looking for. Join us in shaping the future of product-led AI without the bureaucracy of a large organization.
Overview
Role overview
Company
About the company
Seed-stage product-led AI startup
Responsibilities
What you will do
- Design, build, and deploy production-grade AI systems and LLM-powered features from scratch.
- Collaborate directly with founders to define product roadmaps and translate customer needs into technical solutions.
- Manage the entire engineering lifecycle, from rapid prototyping to maintaining scalable, customer-facing infrastructure.
Candidate profile
Who this is a fit for
- Proven track record of shipping production AI systems in a startup environment or small, high-growth team.
- High degree of technical autonomy with the ability to own large, ambiguous product surfaces independently.
- Pragmatic approach to engineering, focusing on speed-to-market and building robust systems without needing a large supporting cast.
What makes it remarkable
Why this role is remarkable
- Rare opportunity to join as a founding engineer and shape the technical direction of a seed-stage venture from the ground up.
- Backed by top-tier VCs, providing a stable foundation with the agility of a tiny, high-performance team.
- Direct impact on product strategy, working alongside founders to solve complex problems without the overhead of a large platform team.
Jack & Jill
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.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
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 it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.