If it's complex business logic and will grow bigger: Kotlin + Micronaut/Spring Boot + Krush/Hibernate If it's quite simple and has a clear outlined border: Go +

If it's complex business logic and will grow bigger: Kotlin + Micronaut/Spring Boot + Krush/Hibernate If it's quite simple and has a clear outlined border: Go + Gin Add login and auth and stuff via ory/keycloak