Johan is a Software Architect at ASML, with extensive experience working for various high-demand companies where delivering high-quality software quickly was crucial. He is a prolific writer, regularly contributing articles to InfoQ and Java magazines, primarily focusing on Java.Johan is also a seasoned speaker, having presented over 100 conference sessions across 28 countries at prestigious events such as JavaOne, GOTO, Devoxx, JavaZone, J-Fall, J-Spring, Jfokus, and JavaLand. His contributions have been recognized with the JavaOne Rock Star, Oracle Code One Star, and Oracle ACE Pro awards.