Pretty simple: I just got a job here. A job comes with a work visa. There's lots of places where you can get jobs with local companies that will sponsor a visa for you. Then usually, after living in the new country for a while, you're able to apply for permanent residency. Given that this is HN and many people here work in tech, the tech industry in many countries is just as desperate for competent workers as in the US.

It heavily depends on your abilities to get a decent paying job.

If you can convince the review process that out of the gate you'll have stable income (won't be a burden to their society - better yet if you already have the job at entry), is well behaved with potentially high education, the door with easily open.

I think a lot of people here would fit the criteria. Now it becomes exponentially harder the farther you're off that golden path.

I have recruited a lot of people from all around the world, including from USA, to Helsinki. From USA, it's easy for employer and employee. Simplified, one can start working right away and the permanent permits come through before the temporary ones run out. (My info is a couple of years old.)