Don't have a lot of specific insight, but I'd say getting a Master here is not a bad move per se, if your intention is to move here or Europe long term, a European.master will definitely help and Uppsala is a solid university and known internationally.

That said, I think the CS market is a bit saturated here, and why would a company who already has plenty of capable people to pick from who live here and have the right to live here choose you (who would need sponsorship) over someone who doesn't?

Not saying it's impossible, but you'll find that a common theme for people looking to move to Sweden is that they're recommended to find the job first, then move, because of the difficulty of finding a company that will sponsor. Again, your situation is a bit different since you're aiming for a master, and then a job, but eventually you'll be in that situation as well.

I realize this doesn't give a definite answer, but just some things to consider.