I am assistant professor at Delft University of Technology, where where I research end-user programming. End-user programming is programming for everyone that does not think of themselves as a programmer. In my PhD dissertation I worked on applying methods from software engineering to spreadsheets. During my PhD I founded a company called Infotron, which sells a tool called PerfectXL based on techniques I developed to spot errors in spreadsheets. Me, my research and my company have gotten some media coverage over the last years. One of my biggest passions in life is to share my enthusiasm for programming/tech with others. I teach a bunch of kids LEGO Mindstorms programming every Saturday in a local community center. Furthermore, I am one of the founders of the Joy of Coding conference, a one day developer conference in Rotterdam and one of the hosts of the Software Engineering Radio podcast, one of the biggest software podcasts on the web. When I am not coding, blogging or teaching, I am probably dancing Lindy Hop with my beau Rico, out running, watching a movie or playing a (board)game.