Stefan Ullrich holds a PhD in computer science and is a philosopher who critically examines the impact of ubiquitous information technology systems on society. He leads the research group "Responsibility and the Internet of Things" at the Weizenbaum Institute for the Networked Society, Berlin. He was a long-time member of the research group "Informatics in Education and Society" at Humboldt University, Berlin, under Prof. Wolfgang Coy. Subsequently, he conducted research on questions of the tension between "techne and episteme" at the Cluster of Excellence "Image Knowledge Design" at the Humboldt-Universität zu Berlin. His dissertation dealt with the informational foundations of the public use of reason.

Since 2019, Stefan Ullrich has been a member of the Expert Commission for the Third Equality Report of the German Federal Government. He is deputy spokesperson of the expert group "Informatics and Ethics" of the German Informatics Society (GI). He is also an active member of the Forum Computer Scientists for Peace and Social Responsibility (FIfF e.V.) and the Ethics Working Group of Initiative D21. Since 2019, he has been on the advisory board of the International Federation for Information Processing (IFIP), Chapter TC 9.

The mobile education project "Turing Bus", which he co-conceived and is funded by the BMBF, not only teaches central concepts of computer science, but also enables students to express their political opinions. Only on this website does he write about himself in the third person, which is probably due to the template.