Financial technology firm First Derivatives is to create almost 500 new jobs.
The company, which is based in Newry, Co Down, is to take on 484 new employees over the next three years.
First Derivatives provides consultancy services and makes financial analysis software used by banks throughout the world.
It currently employs around 900 people, most of them in Newry.
Northern Ireland's First Minister Peter Robinson said the new jobs would generate over £22m for the local economy.