By Greg Bensinger

SAN FRANCISCO (Reuters) -Just days after putting on its annual devices and services showcase, Amazon is losing a vice president who helps oversee the division.

Rob Williams, vice president of device software and services and a member of the elite internal group known as the S-team advising CEO Andy Jassy, left his post and will step down entirely from Amazon at year’s end, according to a memo sent internally Thursday and reviewed by Reuters. Amazon confirmed the memo after a query from Reuters without providing additional detail.

“Rob has had a big impact on the software and experiences of nearly all of the products we’ve created and shipped,” said Panos Panay, the senior vice president of devices and services, in the memo. He said Williams decided to “retire from Amaz

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