@ThomasT if you are building your own Spring Boot application and have your processes in src/main/resources/processes then everything should work.
Our spring-boot-example does exactly that.
Is it possible for you to create a small reproducal example that displays that this is not working?
Regarding what @jonathanlevis said for adding your configuration class. I’d suggest to have a look at this forum topic that does something similar.
Cheers,
Filip