Founding Engineer (£90k-£110k + Equity) at AI-native fintech infrastructure startup

Founding Engineer (AI Fintech)

Salary: £90k-£110k + Equity

Company Description: AI-native fintech infrastructure startup

Job Description: As the Founding Engineer, you will build the core agentic financial operations platform from the ground up. You will design API-first, multi-tenant systems that allow partner platforms to embed white label AI agents for automated financial workflows. This is a high ownership role working directly with founders to set the engineering foundations and product direction.

Location: London, UK

Why this role is remarkable:

• True founding level ownership with meaningful equity in a high growth AI native fintech.
• Backed by senior industry advisors from global payment giants and top tier fintech companies.
• Massive surface area to build production grade AI agent systems rather than simple experiments.

What you will do:

• Build the core platform end to end, including backend APIs and frontend integration components.
• Design and implement multi tenant agentic workflows using LLMs as core infrastructure.
• Partner directly with founders on architecture, product trade offs, and technical strategy.

Ideal candidate:

• Senior full stack or backend leaning engineer with hands on experience shipping AI enabled products.
• Proven track record of building zero to one products or early stage systems in production.
• Pragmatic systems thinker who thrives in high autonomy environments without heavy process.

Next steps

1. Visit our website.
2. Click 'Talk to Jack'.
3. Talk to Jack so he can understand your experience and ambitions.
4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
6. If not, Jack will find you excellent alternatives. All for free.