As an EU expat you can easily move to Croatia thanks to EU freedom of movement, most people in the tourist areas speak decent English. I don't know anything about bureaucratic issues for non-EU expats though.

Foreign companies however aren't really willing to open remote offices/parks there because most of the talent pool (not just in IT but across all industries!) heads off to Germany or other countries where there is real earning potential. The "brain drain" across the whole Balkan is immense.