Steffen Hohn studied physics at the Carl-von-Ossietzky University Oldenburg, Germany. Today he lives in Zürich, Switzerland. Since 1997 he has participated in many projects in the role of a developer, coach and consultant. He has good experiences with Scrum, eXtreme Programming and Test-Driven-Development. Besides Java he has used Perl, PHP and C during many projects. Furthermore, he did a research project on a big linux cluster using the MPI library for the purpose of massive parallelized computation. In 2010 the Javamagazin published his article on object-oriented metrics and their visualization. He is certified as a ScrumMaster and as a project lead in the german V-Modell XT.