Roy van Rijn is director at OpenValue Rotterdam and 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 (www.royvanrijn.com) or follow him on Twitter (@royvanrijn).