A financial services firm is to increase its workforce by 200 in Dublin and Galway.
Fidelity Investments is to expand with new positions in technology, back office operations and enterprise services.
The company established its presence in Ireland in 1996 and now employs almost 500 technology and operations professionals.
In 2011, Fidelity announced plans to hire 100 new technology professionals but the number more than doubled earlier this year with the final figure growing to more than 250 employees.
"Ireland is a proven market in which Fidelity can continue to develop a vital part of our increasingly global organisation," said Travis Carpico, president of Fidelity Investments Ireland.
The investment is supported by the Department of Jobs, Enterprise and Innovation through IDA Ireland.
Meanwhile, gaming company Swrve has announced plans to add 100 jobs to its workforce over the next two years.
The firm, one of the world's leading mobile gaming businesses, will create the jobs on the back of funding worth 6.25 million US dollars (4.92 million euro/£3.93 million) led by Atlantic Bridge Partners and Intel Capital.
Swrve is already used by some of the world's largest games publishers - handling the data of more than five million players every day.
Hugh Reynolds, Swrve chief executive, said: "This funding round puts us in an outstanding position for growth. Our team in Dublin already consists of the brightest and best - we just need more of them. A lot more."