Constanze is the spokeswoman of the German Chaos Computer Club. Constanze is an author und freelance writer on technical topics and works at Berlin-based netzpolitik.org. She holds a doctoral degree in computer science. She is an activist and expert on surveillance techniques and co-authored technical analyses for the German Constitutional Court on controversial cases like data retention, covert infiltration of IT systems (law on the Federal Criminal Office (BKA-Gesetz)), anti-terror database, and voting computers.