You will join Stackfix as a founding engineer to build and deploy production AI systems for diverse industries. Working directly with exited founders, you’ll bridge the gap between frontier models and enterprise workflows, shipping end-to-end software that processes real transactions. This is a high-agency role focused on solving valuable, real-world problems.
Founding Applied AI Engineer at Stackfix
Join Stackfix as a Founding Applied AI Engineer and work directly with repeat founders who have sold companies to TikTok and beyond. Unlike many AI roles focused on chatbots, you will deploy frontier models inside real-world businesses like PE funds and manufacturers to drive actual profits. This is a high-agency, London-based role offering £100k-£120k plus significant equity, perfect for engineers with 4+ years of experience looking for the ultimate training ground for their own future startups. Build production systems that handle real transactions and transform the global economy through technology diffusion.
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Location
London, United Kingdom
Compensation
£100k-£120k + Equity
Company
Stackfix
Role overview
Software Development2-10 employees
Stackfix is the AI transformation layer for real businesses. We go in, understand the workflows, and deploy frontier AI that grows profits. Backed by Seedcamp, Chalfen and DeepMind angels. Founded by two exited AI entrepreneurs. If you want to grow economies, not build chatbots - let’s talk
What you will do
- Build and ship production-ready AI systems end-to-end, from initial scoping with enterprise clients to deploying software that handles hundreds of daily transactions.
- Join client calls and visit sites to understand complex business workflows, presenting your work directly to leadership at global firms and investment funds.
- Iterate on frontier AI models and tooling to create robust systems that review patient records, process factory orders, or audit complex financial obligations.
Who this is a fit for
- Possesses 4+ years of full-stack software engineering experience with a proven track record of shipping production systems rather than just building isolated features.
- Demonstrates high agency through a portfolio of side projects or open-source contributions that show a natural hunger for building and solving technical problems.
- Combines strong technical implementation skills with a genuine curiosity about business operations, capable of learning fast and performing at a high level in person.
Why this role is remarkable
- Work directly with repeat founders Paddy Stobbs (sold Jukedeck to TikTok) and Tom Dekan, gaining unique daily insights into selling, building, and scaling AI.
- Gain unparalleled exposure to frontier AI in production, learning which models and methodologies actually deliver value in high-stakes business environments rather than just following hype.
- Enjoy rapid variety by solving unique problems across diverse sectors like PE funds and logistics, providing better entrepreneurial preparation than years spent on a single product.
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 Stackfix wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.