Is the Java ecossystem of languages and related stuff a thing, professionally?

I'm in the course of pursuing a change in my career towards software engineering/architecture. So far I've been brought mostly to C#/.NET and Java, though Java attracts me more, even considering that it might be a "dying" language. Still, Scala and Clojure are there, so I thought that they might give a pump at least to JVMs. In your opinion, should I invest in pursuing certifications/jobs in this field, or sticking to C#/.NET is a better path?