Senior Backend Engineer – Kotlin/Java | FinTech |
Spain | Fully Remote via EOR

Are you a Backend Engineer looking to work on the modernisation of a growing FinTech platform?

We're partnering with a growing

lending FinTech

building customer-facing financial products at scale. As the platform continues to evolve, they're looking for a

Senior Backend Engineer

to join the team and help build the next generation of their backend services.

Kotlin

is becoming an increasingly important part of the engineering stack, but you don't need to already be a Kotlin expert. They're equally interested in strong

Java engineers

who understand the JVM ecosystem and are keen to move into Kotlin.

This is a hands-on product engineering role where you'll have the opportunity to build new services, contribute to technical decisions and help modernise an existing technology estate.

Being a growing FinTech means engineers have genuine ownership. They're looking for someone who enjoys solving problems,



working closely with Product and taking responsibility for what they build rather than simply picking up tickets.

What you'll be doing
Designing and building

scalable backend services

across a modern financial technology platform.
Developing new services primarily using

Kotlin .
Working across a

cloud-based environment

and helping build reliable, maintainable systems.
Designing and developing

APIs, services and backend architecture .
Contributing to the ongoing

modernisation of the platform , including moving functionality from legacy technologies into modern JVM-based services.
Working with existing services, including parts of the platform written in

PHP .
Taking ownership of your work from design through to delivery.
Contributing to

technical decisions, code reviews and engineering best practices .
Using and engaging with

AI tooling

as part of modern software engineering workflows.
Working closely with Software Engineering, Product and other stakeholders in a small, cro

📌 Back End Developer (Madrid)
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