Explore the Vert.x 3 Scala stack in this 46-minute conference talk from Scala Days Copenhagen 2017. Dive into the polyglot toolkit for building reactive applications on the JVM, focusing on its simple yet powerful threading concept and easy cluster management. Learn about the newly added Scala capabilities, including a walkthrough of the current stack and available modules, bootstrapping an SBT-Vert.x project, running and testing microservices, and how Scala enhances the Vert.x programming experience. Witness a full demo of an elastic Vert.x cluster, with plenty of code examples and opportunities for discussion. Cover topics such as the Reactive Manifesto, Vertx basics, HTTP event bus, deployment, multicasting, chat server implementation, and resilience in a hands-on, code-focused presentation.