Founding Applied AI Engineer: Build Production AI Systems

Company: Stackfix
Apply for the Founding Applied AI Engineer: Build Production AI Systems
Location: London
Job Description:

What we do: We take frontier AI and deploy it inside real businesses

A factory still processes orders by hand. An international law firm has humans copying data between systems. A multi-billion dollar fund still manually checks its obligations.

We fix this.

We go in, understand workflows, and build AI systems that grow profits. These are production systems processing hundreds of transactions a day, or reviewing thousands of records an hour – generating real earnings for real companies.

Our work spans professional services, manufacturers, distributors and the funds that back them. Each project is different. Each grows the global economy.

Who you’d work with

Paddy Stobbs (LinkedIn): Co-founder & CEO. Previously founded Jukedeck (neural networks for music generation, sold to TikTok). Before that, Google and Zetta Venture Partners.

Tom Dekan(LinkedIn): Co-founder & CTO. 8+ years building AI systems. Founded and sold an HR software company in 2023. Earlier work for hedge funds and Allen&Overy.

We’re backed by Tier 1 investors and angels from DeepMind.

What you’d do: own AI builds end-to-end for specific clients.

  • Sitting with operators on-site, mapping how work actually flows through their systems
  • Designing the architecture and shipping working software in weeks, not quarters
  • Integrating with whatever the client runs
  • Presenting results to client leadership
  • Owning the system in production once it’s live

A typical project:

  • Week 1: On-site with a client, mapping how their core workflow runs today.
  • Week 4: Working prototype handling the highest-volume cases automatically.
  • Week 12: System processing hundreds of transactions a day. Presenting results to the board.

Projects run 4-9 months. Every line of code you write powers real transactions.

What you’d get

  • Senior ownership from day one. No layers, no committees. You decide the architecture, you ship, you stand behind it in front of customers.
  • Work at the frontier. The models, tools, and patterns we use are 12 months ahead of where most companies are. You’re applying them to systems that need to actually work.
  • Ability to solve valuable problems in real businesses. Different industries, different systems. Better preparation for entrepreneurship in 3 months than 3 years on one product.
  • Direct line to two exited founders. We have both sold businesses previously. You see how we sell, negotiate, build, and run the company. If you want to start something later, this is the training ground.
  • Materially: – New Macbook Pro (and subscriptions to any AI models you want to use)
  • – Central private office (Holborn)

Who we’re looking for

  • 5+ years building production software. Strong Python, comfortable with whatever stack the job needs. We care about systems that worked, not job titles.
  • A track record of shipping things that mattered. Walk us through a system you built, why you built it that way, what broke, and what you’d do differently.
  • Commercial instinct. You’ll be in rooms with CEOs, CFOs, and operating partners. You don’t need an MBA, but you need to want to understand what drives profits.
  • High performer in something. Paddy was a professional singer from age 8. Tom played water polo for GB. We’re looking for the same pattern of obsession applied to code.

Who we’re not looking for

  • sees work as the thing that funds their life.
  • doesn’t view work as a major source of life fulfilment

We don’t do 80-hour weeks. We value sleep highly. But growth has to be a priority for you.

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Posted: May 27th, 2026