It wasn't terribly difficult, you just have to find a company to hire you. Weirdly the biggest issue I ran into was companies not believing I was willing to relocate and assumed I was just some idiot looking for a remote role. The paragraph about it in my cover letter didn't seem to matter.

Apparently I was initially rejected for that reason, but my boss dug me out of the file for a potential discussion about a US based role. He told me that 6 months later over pints.

Once you've got an offer the critical skills employment permit (CSEP) is quick and painless.

All in all it was basically a lateral move lifestyle-wise. "Federal" income taxes are high-ish, but there isn't another level of state and local taxes eating away more; and property taxes are practically nonexistent (€280/year I think?). There are a handful of schemes which will shield a decent chunk of income from the highest tax rates, and the company benefits are fantastic (medical 100% paid for for my entire family, good bonus, 2:1 "401k" match).

As mentioned, housing is absolutely horrible right now, especially for renters. Luckily home prices are still somewhat reasonable compared to the US - we made enough selling our US home that we could buy an Irish property outright. Can't get a mortgage or any sort of credit until you've been in the country for 6 months. Probably won't stay in this place more than 2 years (when I get permanent residence on the CSEP route) but its a comfortable enough spot to get settled.

I wish it was a bit less car-focused, but there will be a train that drops me off basically at my office door in ~2 years, so they're trying and improving pretty quickly.