Microservice applications often change communication protocols between services from request-response to event streaming. Apache Kafka® is a great choice for addressing the challenges of building high-load applications at scale. This session will provide an introduction on how to use Kotlin and Ktor to build an application that shares geographical coordinates among clients. Viktor will give an introduction to Ktor, the Kotlin framework for building connected applications. After that, Viktor will demonstrate how event streaming works with Kafka, and he will identify the other features the platform provides for scaling the solution. All of these pieces of the applications will be weaved together through a series of hands-on demos to create an event-driven application. This session exercises will use Kotlin with Ktor, but the examples will be explained from a Java developer's point of view.