Dimitri Gielis is the founder and CEO of APEX R&D. He has over 18 years of experience with Oracle technologies including being an Oracle ACE Director. He presented on using service workers in Oracle Application Express. Service workers allow web applications to have rich offline experiences through features like periodic background syncs, push notifications, and geofencing. The presentation covered what service workers are, the problems they solve, their lifecycle, an example of using one, and potential use cases in APEX applications.