Founding Full-Stack Engineer (Greenfield Digital Banking) Central London | 4 days onsite | Full-time £90,000 - £100,000 + 15-20% bonus

We're working with a highly successful, family-owned international private bank to hire a Founding Full-Stack Engineer for a brand new, greenfield digital banking build based in Central London.

This is a rare opportunity to join right at the beginning of a newly formed product team and help build a next-generation digital banking experience from first principles deliberately outside of legacy systems. The environment is genuinely "startup-style" (small team, high ownership, fast delivery), but backed by serious scale, long-term investment, and a strong focus on quality, stability and client trust.

The role As one of the first engineering hires, you'll play a key part in shaping:

the technical foundations
engineering standards
architecture and system design
how the team builds and ships productYou'll work closely with Product and Design, delivering secure, high-quality digital experiences for high-value clients and complex workflows.

What you'll do

Design, build and maintain end-to-end features across frontend and backend
Architect scalable, secure and maintainable systems for private banking / institutional use cases
Own key technical decisions, balancing delivery speed with long-term quality
Build APIs, services, data models and modern web experiences
Establish high standards of engineering quality through testing, reviews and automation
Contribute to platform foundations, shared components and internal tooling
Embed security, performance and resilience best practices into everything you ship
Help define engineering standards and ways of working as the team grows
What we're looking for

8-12+ years' experience as a full-stack or senior engineer owning production systems
Strong experience building modern web applications across frontend and backend
Frontend expertise with modern frameworks (React, TypeScript or similar)
Strong backend experience (Node.js, Java, Python or similar)
Solid understanding of APIs, architecture, databases and cloud infrastructure
Exposure to CI/CD and modern DevOps practices (containers, Kubernetes, automation)
Comfortable being a technical owner in open-ended / ambiguous environments
A builder mindset - pragmatic, delivery-focused, and quality-led
Experience in financial services / fintech / regulated environments is beneficial but not essential
Strong awareness of security, privacy and compliance considerations is highly valuedWhy this opportunity stands out

Genuine greenfield build with meaningful ownership from day one
Founding hire in a small, high-calibre team
Startup-style delivery with the backing of a global financial institution
Direct access to decision-makers and influence over product direction
Quality-first culture focused on trust, stability and long-term value
Competitive salary + strong bonus + benefits