Stefan is one of the founders of JustBook - the Berlin-based company behind the award winning JustBook App for Last-Minute-Hotel bookings. JustBook has grown into several international markets and across plattforms since launch in January 2012. Stefan is a seasoned founder and investor in the internet and mobile spaces. He is the founder of social career network (in 2000) and DoTank Mobile (in 2001). He has worked in Venture Capital in London where he helped build companies like truphone and Empora. He is an investor in several internet start-ups including WeGreen, JustBook, PrepLounge, Amazine, miBaby. Stefan is a co-founder and advisor to the European Piratesummit, an award-winning start-up conference held in his favorite city of Cologne. Next to building businesses and nurturing the start-up scene, he is passionate about cooking and hopes to someday be able to open his own restaurant.