He studied architecture at the RWTH and at the Edinburgh College of Art, Scotland. After graduating, he worked as an architect and later as a researcher at the RWTH for a project funded by the Federal Office for Building and Regional Planning on the use of new technologies in an urban environment that is suitable for families and the elderly. He then received a postgraduate scholarship and lived in Tokyo for 18 months where he first studied Japanese for 10 months to then work in two Tokyo-based architecture firms. After returning to Germany he joined the eHealth Team. Kai investigates how architecture, design, and HCI are redefining themselves in a world of ubiquitous computing. His current focus lies on interfaces between humans and technologically enhanced space.