Wombat Financial Software is to invest £2 million (€2.95 million) in its Belfast operations, creating 77 new jobs.
The American-owned firm provides software that is used to supply stock exchange data to financial institutions at high speed in order to support automated electronic trading.
Invest Northern Ireland will provide almost £1 million in backing for the expansion.
Wombat has been in Belfast since 2005 and now carries out all its development work in the city. It currently employs 125 staff worldwide.
Danny Moore, chief operations officer, with the firm said Wombat was on an aggressive growth curve and its revenues had grown 10-fold in the last 12 months. The company is privately held and has been self-funding to date.
Mr Moore said the company had been attracted to Belfast because it is a convenient location to serve both the US and London markets and because of the high quality of the local educational system.
It claims to have approximately 100 customers, which include Merrill Lynch, Bear Stearns, Deutsche Bank and RBC Financial Group.
Earlier this year, Wombat acquired Harco Technology, a supplier of software to trading floors, which also had offices in Belfast.
Mr Moore said the additional 77 new jobs would inject £15 million in salaries into the local economy by 2010.
Separately the company announced yesterday that Belfast-native Tony McManus, formerly technical architect with UBS, has been appointed Wombat's director of algorithmic trading solutions.
