Monex Financial Services is to fill 20 positions at its headquarters in Killarney, Co Kerry, to handle new business and overseas growth.
The new jobs are senior positions in software engineering, quality assurance and project management.
The financial services firm, which handles payments worth more than €17bn annually, processes credit card transactions in several currencies.
Monex Financial Services was established in Killarney in 1997 and now employs 135 people at the headquarters. The company operates in 26 countries worldwide.