Do you have practical experience developing in Kotlin?

Yes, I have practical experience in Kotlin development. I have used Kotlin for creating Android applications and server-side logic. Kotlin is convenient due to its concise syntax, support for functional features, and full compatibility with Java.

For example, in Kotlin, you can easily create a data class for storing data:

data class User(val id: Int, val name: String)

I also used coroutines for asynchronous programming, which greatly simplifies working with threads and network requests.