Well so let's say you're an "enterprise developer" with Java/Scala for the backend and some JS skills. From the looks of it you also into the big data stuff... Are you really willing to switch to (for example) PHP or Ruby on Rails just to be able to work remote?

I'd say start looking for a remote job which requires your skill set. If you start seeing a need for some new tech in your "portfolio" based on what you're seeing out there - won't hurt to take a look at it, maybe do a "weekend POC" type project push it to github and add that tech to your resume :)