Now hiring at Amazon: Thousands of people in 1 day

Amazon plans to make thousands of job offers in just one day as it holds a giant job fair next week at nearly a dozen warehouses across the U.S.

Those offered jobs on the spot will pack or sort boxes and help ship them to customers. Nearly 40,000 of the 50,000 jobs will be full time. Most of these jobs will count toward Amazon's previously announced goal of adding 100,000 full-time workers by the middle of next year.

The hiring spree is yet another sign of Amazon's massive growth at a time when traditional retailers are closing stores and cutting jobs.

PREPARING FOR THE HOLIDAYS

It's also a way for Amazon to lock in employees before the start of the busy holiday shopping season, when other retailers look to hire seasonal workers. Retailers are facing a tighter job market; the nation's unemployment rate is 4.4 percent, near a 16-year low.

Same-day job offers, like Amazon is promising, are "extremely unusual," said Andrew Chamberlain, the chief economist at job site Glassdoor.

He said a shortage of workers, plus Amazon's rapid growth, is likely why the company is trying to scoop up workers quickly.

"There are just not as many available bodies," Chamberlain said. "It can be a real challenge to hire."

LABOR GROWTH

Amazon has long been known for investing the money it makes back into its businesses. Part of that involves opening new warehouses, or fulfillment centers, and filling them with employees. Consequently, Amazon has often reported quarterly losses , even as revenue grows.

The number of full-time and part-time workers at Amazon has swelled from 56,000 at the end of 2011 to more than 340,000 last year. In roughly the same period, the number of people employed by the parent company of Sears and Kmart has been slashed in half to about 140,000 workers.

Amazon plans to expand further: It recently announced a $13.7 billion deal to buy organic grocer Whole Foods, it added Sears' Kenmore appliances to its website and it's rolling out its own ready-to-cook meal kits, competing with companies such as Blue Apron.

THE DETAILS

Amazon's stock increased $12.93, or 1 percent, to close at $1,052.80 Wednesday, after Amazon announced its plans.

Amazon.com Inc. said its jobs offer health insurance, disability insurance, retirement savings plans and company stock. Pay differs based on location, according to job postings on Amazon's site. It is offering a starting rate of $13 an hour for a full-time job in Baltimore and $12.25 an hour for a similar position in Kenosha, Wisconsin.

The job fair will take place next Wednesday from 8 a.m. to noon local time and will include tours and sessions with company representatives. Job prospects will also be introduced to robots and other automation technology Amazon uses at its warehouse operations.

The event will take place at 10 Amazon shipping sites. Besides Baltimore and Kenosha, they are Chattanooga, Tennessee; Etna, Ohio; Fall River, Massachusetts; Hebron, Kentucky; Kent, Washington; Robbinsville, New Jersey; Romeoville, Illinois and Whitestown, Indiana. Amazon will also hold events for part-time positions in Oklahoma City and Buffalo, New York.

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AP writer Michelle Chapman in Newark, New Jersey, contributed to this story.