Vert.x Courses
Devoxx via YouTube Vert.x 3 - Be Reactive on the JVM but Not Only in Java
Devoxx via YouTube Vert.x 3 Goes Scala
Scala Days Conferences via YouTube The Art and Science of Thriving Developers
Devoxx via YouTube Building a Scalable Ecosystem for High-Load Multiplayer Games
Conf42 via YouTube