He previously worked as an assistant professor for digital media at the University of Bayreuth (2009-2014), at the University of Bonn (2004-2006), at the Fraunhofer Institute Media Communications in St. Augustin (2002-2004) as well as in the digital games industry, most notably at Nintendo of Europe (2007-2009). Since completing a DAAD-funded visiting scholarship at MIT, Stefan has been a fellow of the Convergence Culture Consortium. His research focuses on digital game studies, popular media culture and the implications of economic transformations on media use.