Hangzhi Yu is currently doing his federal voluntary service at a Berlin NGO. He joined AlekSIS after he started developing software in one of the predecessor projects during his school days at the Katharineum in Lübeck and experienced in practice what an important contribution Free Software can make to good education. He is currently involved in the AlekSIS project as a full-stack developer and is particularly interested in making the user experience more intuitive and thus making everyday life in schools more comfortable.