The general Alumni organisation of JKU is the Kepler Society, which provides information, continuing education as well as talks, workshops and other events to all JKU graduates. It also runs a career center.
The ÖGI (Österreichische Gesellschaft für Informatik) provides a special forum für computer science alumni of JKU.
Finally, some computer science institutes have their own Alumni club, e.g.:
Here are some statements of JKU Computer Science alumni about their experiences during study and their current work.