LinkedIn is adding 800 staff to its international headquarters in Dublin, which will bring its Irish workforce to 2,000 by next year.
The professionally focused social network said it had already filled 300 of those positions, with a further 100 jobs - in areas including sales, finance and analytics - currently being advertised.
It said the remainder of the positions at its Europe, Middle East and Africa headquarters in Dublin city centre would be filled by summer 2020.
"Our Irish office has become our second largest office in the world, after our global HQ, and our Irish members are some of the most active and engaged on our platform," said Sharon McCooey, head of LinkedIn Ireland.
"LinkedIn's ability to grow its team in Dublin at such an impressive rate in recent years is a great endorsement of the talented workforce in Ireland," said IDA Ireland's CEO Martin Shanahan.
"This is yet another significant investment by the company in the country and clearly demonstrates LinkedIn's long-term commitment to Ireland," Mr Shanahan added.
LinkedIn, which is owned by Microsoft, also announced this morning that Irish membership on its platform has now surpassed 2 million.