Matthias Merdes is a Senior Developer at Heidelberg Mobil International GmbH, a German software development company focusing on mobile web portals where he is responsible for architecture and quality aspects as well as for shaping the agile development process. Originally a physicist, he has worked as a software developer in research projects in the areas of medical informatics, geoinformatics, and software engineering. Matthias has spoken at developer conferences and served as a reviewer for Software: Practice and Experience and the IBM Systems Journal. After more than a decade in software academia and industry he is now especially interested in how to balance the quality and productivity aspects of concrete development projects. Above all he is still a happy programmer.