Chan-jo Jun runs a law office for information technology law with nine attorneys in Würzburg, Germany. He came to prominence internationally through his juristic efforts against hate crimes on Facebook. His preliminary investigations against Mark Zuckerberg and other Facebook managers brought Facebook to justice. With his team, Jun works on the use of artificial intelligence to solve juridical tasks in legal departments. He focuses on software licensing law in general, and open-source software in particular. Among his clients are medium-sized software companies as well as automobile manufacturers. However, part of the team’s work remains dedicated to unpaid social commitment.