The jobs run a gamut from sales people to software engineers for Facebook's 1.35-billion-member social network.
Facebook's growth spurt comes as the company expands into new markets and faces stiffening competition from Web rivals Google Inc, Alibaba Group Holding Ltd and well-capitalized start-ups such as Snapchat.
"There's a fairly direct correlation between their investment in people and servers and infrastructure, and their ability to remain competitive," said Robert Baird & Co analyst Colin Sebastian.
Facebook had 8,348 full-time employees at the end of September, far fewer than Google's roughly 55,000 employees or Microsoft Corp's roughly 127,000 (Microsoft announced in the summer that it plans to cut 18,000 jobs).
At the same time, Facebook gets more out of each employee, according to calculations using company revenue figures. Facebook's revenue works out to roughly $384,000 per employee in the third quarter of 2014, versus $300,000 for Google and $183,000 for Microsoft.
That efficiency has helped Facebook enjoy rich profit margins. And the company's relatively small headcount provides an important talking point in the battle to attract the most talented computer programmers.
Facebook has long touted to potential recruits their ability to work directly on products used by hundreds of millions of people, a marked contrast to some larger tech companies.
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"We're growing as fast as we can, where the 'can' part is really a factor of how many people we can absorb while maintaining a strong culture," Paul Carduner, an engineering manager who runs Facebook's Seattle office, told Reuters at one of the company's famed 'Hackathon' events last week.
The hackathons feature Facebook programmers hunched over their computers and working through the night on personal projects that could eventually become Facebook products.
Facebook is growing exponentially in Seattle, a tech hub with a rich, and relatively cheap, talent pool created by local tech companies Microsoft and Amazon.com Inc. Facebook currently has more than 400 employees in Seattle, and is looking for a larger site close to the center of the city that could hold as many as 2,000 people, according to a person familiar with the matter.
At Facebook's Menlo Park, California, headquarters, construction is expected to be completed this year on a new, roughly 500,000 square foot building designed by architect Frank Gehry that can accommodate 3,000 employees.
Atlas, the online advertising technology that Facebook acquired in 2013, is another big area of hiring, with more than 20 open positions listed.
The many opportunities Facebook is chasing could lift the company's annual revenue to $30 billion within a few years, estimates Arvind Bhatia, an analyst with Sterne, Agee & Leach.
"To get to that level, they're going to have to get people now," Bhatia said.