Roy van Rijn is director at OpenValue Rotterdam and a Java Champion. He worked on numerous projects all over the Netherlands as developer, architect and agile coach. He talks at conferences all around the world, CodeOne (Rockstar), Devoxx BE & UK & PL, GOTO, Joy of Coding, and local JUG events. You can read more at his blog (http://www.royvanrijn.com) or follow him on Twitter (@royvanrijn).