Realex payments, an online payment company, is to create 50 new jobs to bring the total employment at its Dublin office to 170.
The new positions, launched by Taoiseach Enda Kenny, are expected to be filled by the end of next year.
The jobs will be in the areas of IT, product management, business development and customer services, and will be based at Sir John Rogerson's Quay in Dublin city centre.
The expansion is aided by Enterprise Ireland. Enterprise Ireland's chief executive said that the company was a prime example of the ambitious Irish companies that are driving export growth.
The company founder and CEO, Colm Lyon, said that the new office would allow more investment in the learning and research development the company is undertaking following international expansion, with a view to further international expansion.