Founding AI Engineer in Soho, Greater London

Founding AI Engineer - Agentic Video - Eval Frameworks
 

We’re looking for a Senior Founding AI Engineer to join an early-stage video start-up building AI-powered video tools used in large-scale media environments. With multiple deals already signed and being profitable, now is a terrific time to join as they scale.
 

This is a rare chance to become the first dedicated AI hire in a fast-moving startup that’s already running frontier models in production with real customers. You’ll work directly with the founders, own AI engineering end-to-end, and shape product quality, infrastructure efficiency and technical direction from day one.
 

We’re looking for an exceptional Senior Founding AI Engineer, someone who has shipped AI systems that real users depend on and wants the autonomy to build the next generation of the product their way.
 

What we’re looking for:
 

• Extensive experience across Applied AI / ML / MLOps, with a track record of shipping to production
• You’ve built eval frameworks from scratch, ideally for non-deterministic outputs and used them to make real product decisions
• Strong Python and experience running production AI systems at scale (latency, cost and reliability matter to you)
• Hands-on experience with LLMs, Generative AI, prompt engineering or agentic workflows
• Startup mindset: hands-on, product-focused and comfortable owning problems with no playbook

What’s on offer:
 

• £130k - £200k base (DOE) + meaningful equity
• Founding-level ownership and a real say in technical direction
• 1 day a fortnight in London
• Greenfield AI engineering challenges on frontier models
• Direct collaboration with the founders
   

If you love building practical AI systems, moving quickly and solving real-world problems with modern AI tooling, we’d love to hear from you.
 

Sound like your kind of AI Engineering challenge? Apply now or get in touch for a casual chat to find out more.