Had a play with micronaut and kotlin in the past and quite liked the experience. However, the lack of annotation processing support in IntelliJ for Kotlin did get quite annoying.

https://blog.frankel.ch/spring-to-micronaut/ 😅

And a complementary talk from my colleagues @carlos and Silvio at Novatec ... https://objectcomputing.com/products/micronaut/resources/micronaut-in-action