I like to talk about Kotlin from time to time and you can find my most recent Kotlin talks listed below.
Diving into advanced Kotlin Features (Video)
2019/08/27: Droidcon NYC - New York City, USA
2019/05/10: Devoxx UK - London, UK
Kotlin Coroutines Introduction
2019/02/20: KUG Düsseldorf - Düsseldorf, Germany
Coping with Kotlin's Scope Functions (Slides)
2018/03/21: KotlinNight Frankfurt - Frankfurt, Germany
2018/02/21: KUG Cologne - Cologne, Germany
Introduction to Kotlin for Java Developers with Live Coding
2017/11/16: RheinJUG - Düsseldorf, Germany
2017/10/13: Cologne Intelligence (Open Friday Event) - Cologne, Germany
2017/09/25: JUG Cologne - Cologne, Germany