Interesting slide deck. Integrating Camunda with Oracle APEX is not a dedicated Camunda feature. I have no experience with APEX, so I can’t judge the effort required. Futhermore, I’m not aware of an open-source project in that area. Perhaps the slides’ author can help you.
I already integrate Camunda in oracle apex. When finally i want to go for another task, passing by exclusive gateway the complete task (Rest API) don’t get the variable that I select. Seems like It get confused with the others variables.