I am a Professor Emeritus of Computer Science at the Institute of Computer Science (INF) of the University of Bern, where I founded the Software Composition Group in 1994. I retired from the University of Bern at the end of 2021, and am currently working at feenk.com. I am a co-author of over 200 publications and co-author of the open-source books Object-Oriented Reengineering Patterns and Pharo by Example.