400 jobs have been promised by two companies in Galway and Belfast over the next three years.
An Australian technology company is to create 100 jobs in Galway.
SiteMinder provides an online and cloud computing service for the hotel industry worldwide.
The company will begin recruiting staff immediately and fill the positions over three years.
Galway's thriving technology hub was identified by SiteMinder as a key factor in setting up an office in the west of Ireland.
It will complement the company's multinational base in London, providing online sales and support in the hospitality industry.
SiteMinder's largest customer base is in Europe where online technology looks set to become the most popular method of booking travel products by 2017.
The company already has a number of key Irish hotel groups on its customer base.
SiteMinder will create 100 jobs initially and is actively recruiting graduate sales representatives.
Elsewhere, financial services company Tullett Prebon is to create 300 jobs in Belfast over the next three years.
The development was confirmed this morning at a news conference attended by the First and Deputy First Ministers Arlene Foster and Martin McGuinness.
It is the first major jobs announcement in Northern Ireland since the Brexit referendum result.
Tullett Prebon is a leading inter-dealer broker and has a total workforce of 2,700 people in 24 countries.
It will establish a technology centre in Belfast to support its international growth strategy.