630 jobs are being created by two separate companies.
Microsoft has announced a massive 600 roles for its base in Sandyford.
500 jobs will be created in its Inside Sales Centre immediately, with a further 100 to come on stream in Operations, Engineering, Data Centre Management, Technical Solutions, Search Account Management and traditional customer sales.
Speaking at the announcement of the new investment, The Taoiseach Enda Kenny said: "Ireland and Microsoft have enjoyed a long and prosperous history since their establishment in Ireland in 1985 and I'm delighted that this relationship continues to bloom."
Cathriona Hallahan, Managing Director, Microsoft Ireland said: "The team in Ireland has a long track record of helping the company to deliver against its vision and strategy and now there are opportunities for 600 more individuals to play their part in making the vision a reality."
Microsoft first came to Ireland 32 years ago it now employs over 1,200 full time staff and 700 contract workers.
Meanwhile the company behind Chill Insurance is entering the money lending market. Chill Money will allow borrowers to apply for up to €50,000. The firm is looking for 30 people to staff its Dublin base in the areas of marketing, sales and underwriting.