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Twitter’s head of advertising, product, and core engineering have all left the company.
Ad leader Sarah Personette said she resigned on Friday; engineering lead Nick Caldwell now lists himself as “former Twitter Exec;” and product leader Jay Sullivan deleted his Twitter bio. Meanwhile, former product chief Kayvon Beykpour — who was fired by ex-CEO Parag Agrawal in May — continues to be spotted around Twitter’s San Francisco office.
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