Hendrik is a Java Champion, JSR expert group member and JavaOne Rockstar. Hendrik is a co-founder of Karakun AG and lives in Dortmund, Germany. He is the founder and leader of the Java User Group Dortmund and gives talks and presentations in user groups and conferences. His JavaFX book “Mastering JavaFX 8 Controls” was released in 2014 by Oracle press. Hendrik is a member of the AdoptOpenJDK TSC and represents the Karakun AG in the Steering Committee of the Eclipse Adoptium WG.