For the 27th year, the annual Joint meeting Of the German Research Training Groups funded by the Deutsche Forschungsgemeinschaft (DFG) in the field of computer science took place at Schloss Dagstuhl – Leibniz Center for Informatics. The aim of the meeting is to interactively exchange research results, ideas, and experiences in order to strengthen the German computer science community, also across different levels of seniority. This volume documents the abstracts of the research topics of funded researchers in the participating RTGs. The event was jointly organized by RTG 2428 (ConVeY — Continuous Verification of Cyber Physical Systems) and RTG 2535 (WisPerMed – Wissens- und datenbasierte Personalisierung von Medizin am Point of Care). It took place from Sunday, June 4 to Wednesday, June 7, 2023 (Dagstuhl event number 23233). The meeting consisted of a balanced mixed of research presentations, a project ideation workshop, a poster session and session where junior research could ask senior researchers “anything you always wanted to know about research and a research career”. Additionally, two keynotes on current important topics in computer science were organised: Prof. Thomas Huckle showcased Software Desasters and their prevention, and Johannes Köster advocated for Reproducibility in Research.