Reshma, 18, who became a national heroine after the catastrophe that claimed more than 1,100 lives, was in good spirits and looked healthy at a ceremony at the military facility where she was admitted on May 10.
"I feel great now. I am recovered mentally and physically," she said, smiling.
But after nearly a month of treatment, initially in intensive care, she admitted she was still troubled by nightmares about her ordeal beneath the wreckage of the collapsed Rana Plaza building.
"Whenever I think of those days I feel bad and frightened. I have forgotten most of what I did under the rubble."
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The teenager, who uses only one name, drank rainwater and foraged food from co-workers' lunch boxes to survive after her nine-storey workplace collapsed on April 24.
Two days after her rescue, she said she would never return to Bangladesh's accident-prone garment sector, the world's second biggest, worth USD 20 billion a year.
Reshma, from a remote village in the western border district of Dinajpur, had begun work in the building just 22 days before it fell down. She was being paid a monthly salary of 4,700 taka (USD 60).
"I never thought that I would get my life back again when I was trapped under the rubble," she told the packed press conference in Savar, the Dhaka suburb where the disaster took place.
Azim Shah, general manager of the Hotel Westin, told reporters he was proud Reshma was joining his team.
"We're sure this young girl will be exceptional in her new job," he said, adding she was made a "ambassador in the house-cleaning department".
"Her family accompanied her to the hotel," he said.
At the time of the collapse more than 3,000 garment workers were on shift at the complex housing five factories, where they made clothing for Western retailers including Italy's Benetton and Britain's Primark.
They were ordered back to their production lines even as cracks developed on the outside of the complex.
The industry has since promised to clean up its act. Most major European buyers have signed up to a new accord promising better working conditions, as well as fire and building inspections.