A modern programming language that makes developers happier.

kotlinlang

Kotlin being a new technology, and TornadoFX likewise.. even we attract a fair amount of attention. Another thing to consider is that JavaFX isn't evolving very rapidly, so people developing JavaFX apps don't need to ask questions to figure out how to do stuff. It's all documented or asked and answered. JavaFX is also a subset of Java, so if you ask for a Java developer, you might be requiring JavaFX knowledge, but you don't mention all the classes of the JDK in the job description.