Software company Poppulo is to create 125 jobs in Cork to support an international expansion.
The jobs will be mainly high-tech engineering and R&D roles - and there will also be sales and marketing positions.
The expansion is supported by the Department of Business through Enterprise Ireland.
A parallel expansion in the United States will bring Poppulo's total workforce to over 400 within three years.
It currently employs 200 people - 163 in Cork and 37 in Boston.
Founded by Irish tech entrepreneur Andrew O'Shaughnessy, Poppulo's software is used in workplace communications and engagement in more than 100 countries.
Over 30% of the largest employers in Europe and 20% of the largest employers in the United States are Poppulo customers.
These include Unilever, Bank of America, Nestlé, Johnson Controls and Rolls-Royce.
Announcing the new jobs, Mr O'Shaughnessy said: "Enterprise Ireland has been with us from the start when we were a handful of people and they're just as committed to our success as we scale.
"Supporting home-grown successful indigenous companies so that they can scale is incredibly important".
Business Minister Heather Humphreys added: "This is a great day for Poppulo, Cork and Ireland.
"As an Irish multi-national, Poppulo is rooted in innovation and progression.
"The company's continuous investment in Cork shows its commitment to the local area and its talented workforce."