@jan.rabe Glad to hear it is working well on Android. I read that the issue with mixing Kotlin and Java might have something to do with annotation processing. This is a backend project. Things went well at first, and then the issue popped up later 😕
The developers were enthusiastic about being able to mix Kotlin and Java in the same source-sets - they could do whatever they needed to feel productive, at the same time as gravitate towards Kotlin. That approach didn't go as well as hoped. Last project was all Kotlin and was great fun.