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Customer solutions company Voxpro is creating 400 new positions, as it sets up a new office in Dublin's docklands.
West Pharmaceutical Services is also announcing expansion and creating 100 new jobs at its facility at Damastown Industrial Park, Mulhuddart.
The IDA says Dublin's reputation continues to grow internationally as a technology and internet hub.
Professional networking platform LinkedIn will add 200 new jobs in Dublin.
They will be spread across its sales, sales support, customer operations, and engineering teams.
This news comes as the company prepares to move into a new headquarters at Wilton Place in south-central Dublin.
CEO Jeff Weiner visited the Irish office yesterday and met with Taoiseach Enda Kenny.
Springboard Mortgages is a former unit of the Permanent TSB group - it's been fined €4.5m for overcharging customers for their tracker mortgages.
This ruling relates to 222 mortgage accounts and has been issued for breaking the Central Bank's mortgage rules.
Springboard has since been sold by the bank.
PTSB has since said 1,372 of its customers across its operation and Springboard are involved in the Central Bank's probe. The bank's core business is expected to receive another fine as the Central Bank's investigation continues.
Lufthansa has cancelled another 1,700 flights due to a pilots' strike.
The German airliner will be out of action today and tomorrow as the pay row continues.
Last week they left over 350,000 passengers stranded as staff staged a four day walkout.
Lufthansa has offered a 4.4% hike in wages which has been rejected.