Ask HN: Hiring abroad?

Hi HN,

A graduating CSE-guy here. I've been lately looking into for my first long-term jobs/master's thesis opportunities and been mostly looking outside my recent places of residence;

Long story short, countries tend to have differing practices in immigration, educational systems and recruitment practices. Let's hear yours.

Do you search and hire professionals from abroad? Why/why not? How it usually happens and how often? What are the main obstacles in your process and how do you overcome them? (e.g. visa proceedings, language-issues, interviewing, relocation costs, weird credentials, salaries?..)