Ask HN: Developing a Skillset for Contracting in Europe

I'm a Python developer with a Linux background looking to develop my resume over the next 1.5 years prior to a move to Europe. I'm interested in what advice you could offer.

I'm at a point where I could invest in DevOps and infrastructure skills or go heavily into programming. I've been a developer for 4 years and self describe as intermediate. What I'm looking for is the kind of skillset that would give me mobility throughout Europe so I can travel slowly and focus on seeing new things and living.

I've done a lot of web app backend work, some sysadmin work and really need to step up my knowledge in both depth and breadth. The question is into what? I absolutely hate frontend web work and am frequently bored in web dev.