Founding Engineer: Architect & Build Regulated Fintech

Dex; Greater London; On-site; GBP 140,000 - 220,000; Full time

Job summary

Dex partners with a regulated fintech team in London to hire a founding engineer. You will own the tech stack from architecture to production, building a secure core platform for the European fintech market.

This hands-on role requires 5–12 years in backend and distributed systems, with experience in regulated financial infrastructure. You will set engineering culture and help scale the team, working directly with the founder to translate ambitious ideas into compliant systems.

Qualifications

• 5–12 years of engineering experience in backend systems and production architecture.
• Experience building regulated financial infrastructure (core banking, ledger, payments).
• Founding engineer, early hire, or scaling fintech/infrastructure company.
• Expertise in distributed systems, cloud infrastructure, data integrity, reliability, and security.
• London-based or willing to relocate and able to work in person.

Responsibilities

• Architect, build, and secure the core banking platform from first principles.
• Own infrastructure, backend systems, data integrity, and product engineering decisions.
• Translate regulatory requirements into scalable, compliant financial systems.
• Drive the product from concept to production with a focus on security and reliability.
• Define engineering culture and recruit the foundational team.

Skills

Backend systems

Distributed systems

Cloud infrastructure

Data integrity

Security

Founding engineer experience

In-person collaboration

Job description

Dex partners with a regulated fintech team in London to hire a founding engineer. You will own the tech stack from architecture to production, building a secure core platform for the European fintech market.

This hands-on role requires 5–12 years in backend and distributed systems, with experience in regulated financial infrastructure. You will set engineering culture and help scale the team, working directly with the founder to translate ambitious ideas into compliant systems.