I'd question this. These things might be trending in mind share. And companies looking to hire people with these skills might have somewhat of a shortage. But I'm not sure they are actually in high demand.

It's easy to forget on HN that 90% of tech jobs are in 'dull' bread and butter languages used in enterprises, and nothing to do with the latest trends.

I think the stack overflow jobs stats linked elsewhere in this thread says it all... Java, JavaScript, Python are the most in demand languages right now. Tensorflow doesn't even show up on their list of popular tools.

Where? Even the few ML jobs I'm seeing are really 'basic' from a math point of view, as in apply well studied algorithms from well tested libraries in the most obvious ways to relatively small amount of data. The number of ML jobs that actually require you to understand the underlying building blocks of ML is tiny.