Non resident, online income & VAT

If I'm a non EU resident, ie, living outside Ireland/EU for over 5 years and sell online to people in the US, I don't need to pay any EU Vat, right?

Your tax residency does not decide on the VAT treatment of a supply.

There are "place of supply" rules for VAT which can be complicated but in general if you do not carry out the work in the EU and do not have EU customers then there will be no liability to VAT.