There’s been a large uptick in immigration from the US to Ireland; almost ten thousand last year. In general, people would do this via employment; software engineers and similar would generally qualify for a critical skills permit. For critical skills, after two years on a stamp 1 visa (tied to a specific employment) you can move to a stamp 4 (not tied to specific employment). After five years working in the country you can apply for citizenship.
It's really easy if you just look for jobs elsewhere and go throw the local legal processes, which are generally all easier/better/more helpful than the 'we don't want you' USA. I have lived in Thailand, Singapore, Hong Kong since leaving California and have Permanent Residence now in Hong Kong and Australia.