If you speak English at a high level you could teach English, that's pretty much the number 1 job for foreigners at first.
If you have the time and money to take a qualification like CELTA before you come here, do it. It's not perfect but you'll find a teaching job easier. Plus once you're here you won't be able to take the course in Slovakia as nobody offers it here, and you'll have to travel to do it.
You could search through the jobs on websites like profesia.sk but most of them require you to speak decent Slovak.
If you want to teach English, you can message me and I'll tell you the things I wish I'd known when I came here!