Specialist car insurer Admiral will have taken on more than 750 people by the end of June at its offices in Cardiff, Swansea and Newport, it says.
The only Welsh firm in the FTSE 100 - the list of the UK's top companies - it already employs more than 3,000 people in Wales and another 800 elsewhere.
The firm has recruited 490 people this year and plans to add further 261.
"Car insurance is compulsory. The recession isn't hitting us like other industries," said a company spokesman.
The firm said its recruitment drive - Admiral's workforce will have grown by 11% in the first half of 2010 - was in large part due to the record growth it is experiencing.
Admiral Group people services manager, Ceri Assiratti said, "We're fortunate to be in a position to hire these kinds of numbers.
"The calibre of candidates coming through is very good, so much so that if we've reached capacity in one department, we'll invite those people back for an interview with another department that has openings."
The company is hiring in their claims and sales departments, with some posts in the customer service and renewals departments.
Demand for positions with Admiral is high. Between January and March this year the company's recruitment department conducted 2,338 telephone interviews, saw 1,894 people in their assessment centres and held 819 interviews.
Admiral interviews an average of five people to fill one post.
In March the company reported record profits and continued "strong growth" which enabled it to exceed £1bn turnover for the first time.
Profit before tax in 2009 was £215.8m, compared to £202.5m in 2008, an increase of 7%.
At the time chief executive Henry Engelhardt said the UK car insurance business remained "central to our success", producing a pre-tax profit £206.9m.