It seems that a lot of scientist jobs are advertised on EURAXESS (sometimes mandated by law). There are also research topic-specific job boards… for example Nature Jobs advertises all sorts of positions across the world, although most are in China (since they are desperate for talent). Also by “scientist” I’m referring to anything PhD student-level and above, so yeah. I think Sweden is the country I know which has both reasonable research quality while still being a bit desperate on looking for more applicants

If that’s not possible: a lot of countries have their own job board too, but most of them require knowledge of the local language… (again, scientists kind-of get a pass on this due to English being the lingua franca)

Some companies do international transfer too… like how Denmark is known for pharmaceuticals, so maybe someone working for Novo Nordisk could theoretically ask for that? Although I assume those jobs would be very competitive now…