I am a Professor in Software Technology at the KTH Royal Institute of Technology in Stockholm, Sweden. I hold a research chair from the Wallenberg AI, Autonomous Systems and Software Program (WASP). I am the director of the CASTOR software research center. My research focuses on software diversity and software testing to build reliable, web-based software applications. I perform experimental research with large open source software systems. Experiments support sound science and close collaboration with software industry. Until August 2017 I was a research scientist at INRIA in Rennes, France, where I led the DiverSE research group.