Welcome to my personal web site! My name is Jeroen Kransen. I am a software developer with 20 years hands-on experience, mainly in Java, but doing more and more Scala.

My core competences include:

  • Java, Scala, OO, FP
  • Hibernate, JPA, PostgreSQL and others
  • Semantic Web: RDF, OWL, SPARQL, RDF4J and Jena
  • Ops, Heroku, DigitalOcean, AWS
  • Web development, Spring Web MVC, AngularJS and Play! Framework
  • Akka, ElasticSearch
  • Prototyping, JHipster, Spring Boot

I have worked for ABN Amro, Rabobank, Fortis, Ministerie van Infrastructuur en Waterstaat, KPN, T-Mobile, Casema, Staatsloterij, CZ, NATO, Nederlands Forensisch Instituut, Reclassering Nederland, Gemeente Rotterdam, Vopak, ICTU, Sociale Verzekeringsbank.


  • Reactive Programming with Scala (EPFL)
  • Functional Programming with Scala (EPFL)
  • Sun Certified Web Component Developer (SCWCD)
  • Sun Certified Java Programmer (SCJP)