Back End Developer

Senior - Principal Backend Engineer | FinTech | London or Amsterdam

Join an early-stage Fintech building AI-powered infrastructure to simplify how businesses operate across borders.

International growth still comes with a lot of disconnected financial systems, manual processes and operational complexity. This team is bringing those pieces together into a platform that makes it easier for businesses to enter and operate in new markets.

The role

You’ll build core backend systems across payments, multi-currency ledgers, tax engines and workflow automation from scratch, taking ownership from early design decisions through to production.

The engineering team is small, so you’ll have significant influence over the architecture, work directly with the founders and help decide how the platform develops as the business grows.

Expect technically demanding work where correctness, reliability and scale matter, alongside the freedom to make decisions and see them through.

The team

You’ll join experienced engineers and operators who have helped build the likes of Revolut, Airwallex, Adyen & Yandex. They bring deep experience in payments and financial infrastructure, with strong funding behind them and plenty still to build.

• Strong backend engineering experience, ideally in fintech, payments or similarly complex systems.
• Fluency in a JVM language, preferably Kotlin.
• Sound judgement around architecture, data modelling and distributed systems.
• Someone comfortable taking a loosely defined problem and owning it through to delivery.