Do you have experience working with the Kotlin programming language?

Yes, I have experience with Kotlin. This language is often used for Android app development due to its conciseness and safety. For example, in Kotlin, you can easily declare a function:

fun greet(name: String) {
    println("Hello, $name")
}

Kotlin supports functional features, extensions, coroutines for asynchronous programming, and integrates tightly with Java.