I actually use Kotlin. :) I am happy with either Kotlin or Java though. Reasons for Kotlin is mostly nullability typing though @NotNull gets you pretty far in

I actually use Kotlin. :) I am happy with either Kotlin or Java though. Reasons for Kotlin is mostly nullability typing though @NotNull gets you pretty far in Java these days with the tooling configured correctly. I like the syntax a bit more and extension functions are a nice sugar vs util classes with static functions. The main reason however is I have a lot more luck convincing Typescript developers to try Kotlin than Java which is relevant when most of my colleagues have primarily done Typescript. Either or though IMO, both are great choices for backend development and they interoperate really well.