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 11 years 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.