Tableau Software plans to hire 300 new workers this year, nearly doubling its staff of 350 as business continues to accelerate at the maker of data visualization products.

The company plans to hire the workers at its headquarters in Seattle, as well as branch locations in Kirkland, London and Menlo Park, California. In fact, Tableau said today that it is expanding in Menlo Park with a new office with room for 60 staffers. The majority of the hires will occur in the Seattle area.

The announcement comes on the heels of a big 2011 for the company in which sales doubled to $72 million and it added 160 workers. A spin out from Stanford University, Tableau relocated to Seattle shortly after it was formed in 2003.

The company — often discussed as a possible IPO candidate — is led by former venture capitalist Christian Chabot. Tableau’s business intelligence products help companies more effectively analyze data through graphics.

UPDATE: A spokeswoman for the company said that it plans to expand its office space as they evaluate hiring plans, but it has nothing specific to announce at the moment. Tableau has operated in Seattle’s Fremont neighborhood for the past eight years, but recently added a branch office in Kirkland last year.

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