By Waylon Cunningham -Starbucks' chief technology officer Deb Hall Lefevre resigned without a permanent replacement, according to an internal memo sent to corporate staff on Monday, seen by Reuters. The memo, written by Chief Financial Officer Cathy Smith, named Ningyu Chen, previously senior vice president of global experience technology, as interim chief technology officer. Lefevre, a former McDonald’s executive, was hired in May 2022 as part of the chain's focus on improving its drive-through, mobile ...