The online retailer's staffing levels change with the sales seasons. Still, it managed to add 9,400 employees last year and continues to look for new hires.

"Amazon is currently hiring thousands of positions in all teams and geographies to support continued growth across our business," said a company spokesperson."We're looking for all levels of software engineers, recruiters, buyers and product managers."By Christopher Tkaczyk, reporter

NEXT: Levi Strauss & Co.

Last updated May 05 2011: 2:58 PM ET*Employee headcount is determined on a full-time equivalent basis. Half of part-time headcount is used to determine a full-time equivalent figure.

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