The Opportunity

Within our Payment Products area, we’re looking for an enthusiastic senior Kotlin/Java Developer who’s passionate about building high quality, scalable user experiences. Our domain sits at the heart: between our core banking systems and millions of end customers. We enable processes such as iDEAL Wero, payment initiation, transaction reporting, Betaalverzoek, Insights — and much more — across all channels.

As part of the Digital Insight Squad, you’ll build the APIs behind two of most-used features:

• The transaction overview, which we’re reimagining with a major redesign and new capabilities.

• Insights, where we help customers understand their spending, make smarter decisions, and improve their financial health.

If you enjoy solving complex problems, experimenting with new ideas, and shipping high‑quality software at scale, you’ll feel at home here.

What You’ll Do

As a senior Kotlin/Java Engineer in our Agile DevOps team, you will:

• Develop, enhance, and maintain Spring Boot API's based on our internal high-performing Merak framework

• Own the full DevOps lifecycle: test, deploy, monitor, and improve services. Reliability is key

• Collaborate closely with the front-end teams to build seamless, intuitive customer experiences

• Raise the bar on code quality, test automation, and performance engineering

• Mentor less-experienced engineers and help grow craftsmanship within the squad

• Continuously improve our engineering culture, automation, and CI/CD pipelines

• Work as part of a small, multidisciplinary squad that takes full ownership of its products

Our Tech Stack

You’ll primarily work with:

• Back-end: Kotlin/Java, Spring Boot, Git, Maven, REST, Kafka, Oracle DB, Spring Data/Hibernate

• Platforms & tooling: Github Copilot, Azure DevOps, Kubernetes/OpenShift, Prometheus and Grafana/Kibana

How to Succeed

We hire smart people like you for your potential. We expect you to stay curious, keep learning, and take responsibility. In return, we support your growth in every way possible.

You’ll be a great fit if you have:

• 5+ years of development experience

• Proven experience with Kotlin and/or Java

• Understanding of CI/CD, testing, automation, and DevOps practices

• Fluent communication skills in English

• A hands-on, proactive mentality

• A passion for continuous improvement — personally, technically, and as a team

• Awareness of working in a complex IT environment where IT Risk & compliance matter

Bonus points (Not required, but very welcome!):

• Full-stack experience

• Experience integrating third‑party APIs

• System design expertise or experience building for large-scale, global usage