Markus Gärtner studied computer sciences until 2005. He published his diploma thesis on hand-gesture detection in 2007 as a book. In 2010, he joined it-agile GmbH (Hamburg, Germany) after having been a testing group leader for three years at Orga Systems GmbH. Markus is the co-founder of the European chapter in Weekend Testing, a black-belt instructor in the Miagi-Do school of Software Testing, and contributes to the ATDD-Patterns writing community as well as the Software Craftsmanship movement. Markus regularly presents at agile and testing conferences, as well as dedicating himself to writing about testing, foremost in an agile context.