jamuna news desk: Uber president Jeff Jones is leaving the company after less than six months.
A source at the taxi booking app told the BBC the resignation was "completely unexpected".
They said Mr Jones was frustrated the company was hiring a new chief operating officer and that he was not among the candidates.
But according to technology news site Recode, Mr Jones left because of Uber's continued struggle with issues around sexism and sexual harassment.
Uber said in a statement on Sunday: "We want to thank Jeff for his six months at the company and wish him all the best."
Privately, however, the company has been shocked by his sudden departure, with other executives left disappointed at what they saw as a lack of professional courtesy in informing them of his plans.