08/28/2025 updated

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Backend Entwickler Java/Kotlin, Spring Boot, Continuous Delivery

Amel, Belgium Diplom Informatiker (FH)
Amel, Belgium Diplom Informatiker (FH)

Profile attachments

CV Nils Rommelfanger english.pdf

My main skills are backend development with Java / Kotlin und Spring Boot, Unittesting with JUnit and Mockito, Clean Code, Refactoring of legacy Code and Application Logging / Distributed Tracing.

Besides that I count my sense for quality softare and the cost efficiency that comes with it to my strengthes. In my opinion high software quality enables cost efficient software development. Real continuous integration i.e. trunk based development and reliable automated tests are key techniques to achieve high software quality. 

I am also interested in topics beyond pure software development like architecture, CI/CD, Kubernetes, IAC and cloud.

Ideally I take responsibility for the software in production in thr original sense of DevOps. I.e. you build it you run it. Therefore good observability of the software in production is also one of my main concerns.

Languages

GermanNative speakerEnglishFluent

Project history

Senior Backend Software Engineer

Actico

Banking & Financial Services

250-500 team member

Backend Development Java 17, SpringBoot, Rest, Junit, Mockito, Postgres, Mapstruct, Kubernetes, Jenkins, CI/CD,
100% remote
Banking Compliance Sector

Backend Development Java/Kotlin Kafka

beyonnex.io

Energy, Water & Environment

50-250 team member

- Maintenance of the event driven microservices (Spring Boot, Java/Kotlin, Kafka)
- Desingning and implementing multi tenancy
- Participation in the architecture community of practice
- Improving Observability i.e. logs and adding distributed tracing (Open Telemetry)
- One hour knowledge nugget about application logging

Backend development for a social casino

Ously Games GmbH

Internet & IT

10-50 team member

Maintenance and feature development using Spring Boot, Redis, RabbitMQ, MySQL, Junit, Mockito

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