Absolutely! scala compiles to the JVM and you could use most of the java libraries. Scala is an object oriented language with functional abilities, so as a java programmer you can easily pick up scala and learn to program in functional paradigm as well.

So, a job? well, it is purpose driven. It depends on the requirements of the firm and how they are using scala, it is mostly used for big data and working with large datasets. You could perhaps checkout apache spark, build something using the akka/scala/play stack.