Kees Jan Koster is Java expert and entrepreneur. As a Java expert he specialises in performance tuning of large, distributed systems. As an entrepreneur Kees Jan is the founder and driving force behind http://java-monitor.com, the free, on-line Java monitoring tool.

Kees Jan speaks often and energetically about Java and about distributed systems in general. He likes to challenge the audience to ask questions and offer rebuttal to his ideas. Kees Jan previously gave presentations at JavaOne, JCrete, Devoxx, TheServerSide Symposium, ScanDevConf, jPrime, ejug and J-Fall. His JavaOne presentations earned him a JavaOne 2012 Rockstar Award.