Željko Obrenović (http://obren.io) is a Chief Architect at AVIV Group. Before joining AVIV Group, he worked as a Principal Architect at eBay Classifieds, a CTO of Incision, a principal consultant at the Software Improvement Group (SIG) in Amsterdam, a consultant at Backbase, an assistant professor at the Technical University in Eindhoven, and a researcher at CWI.