Founding AI Engineer for Fintech Platform | Equity

Jack & Jill/External ATS; Greater London; On-site; GBP 90,000 - 110,000; Full time

Job summary

A high-growth AI-native fintech startup is seeking a Founding Engineer to build a core financial operations platform from scratch. This unique role includes true founding-level ownership and equity opportunities, allowing you to construct multi-tenant systems for AI-driven financial workflows. The ideal candidate is a senior engineer with experience in AI product development and a proven record of building innovative products. This position offers the chance to work closely with founders, contributing to both architectural decisions and product direction.

Benefits

Equity in a high-growth startup

Work with industry advisors

Meaningful project impact

Qualifications

• Hands-on experience shipping AI-enabled products.
• Proven track record of building zero-to-one products or early-stage systems.
• Pragmatic systems thinker thriving in high-autonomy environments.

Responsibilities

• 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.

Skills

Senior full-stack or backend-leaning engineering

Experience in AI-enabled products

Building zero-to-one products

Designing API-first systems

Technical strategy collaboration

Job description

A high-growth AI-native fintech startup is seeking a Founding Engineer to build a core financial operations platform from scratch. This unique role includes true founding-level ownership and equity opportunities, allowing you to construct multi-tenant systems for AI-driven financial workflows. The ideal candidate is a senior engineer with experience in AI product development and a proven record of building innovative products. This position offers the chance to work closely with founders, contributing to both architectural decisions and product direction.