Good advice? I hire developers, unlike most hiring managers, I look for people who can solve problems, not specific to a particular language. But you'll be faced with hiring managers who will bombard you with silly questions about particular details of a particular technology. It's unlikely you'll fit the position because what ever technology you learn won't be the one the hiring manager wants. I'd play around with nodeJS to see if you like it. If you do, go for it. I happen to love C++/C# so I'm expert at that. I'd find something you enjoy and become expert in that. The other way is call local recruiters to understand the current demand. They'll be happy to tell you. Keep in mind, technology trends change rapidly.