Irish Prime Minister Enda Kenny officially opened the office, which will offer prime brokerage services.

Ireland is one of the world's largest centres for fund administration but the government wants to attract more front office jobs.

Chief Executive Tidjane Thiam in October announced the bank was looking at moving nearly 2,000 jobs out of London because of its high costs, raising questions about the city's status as Europe's dominant financial centre.

"I welcome the decision by Credit Suisse to become the first 'third country' bank to seek to branch into Ireland," finance minister Michael Noonan said.

(Reporting by Brenna Hughes Neghaiwi; Additional reporting by Padraic Halprin in Dublin)