Re/code said Twitter’s media head, Katie Jacobs Stanton, product head, Kevin Weil, and the head of its engineering division, Alex Roetter, were all leaving the company. It also said that Jason Toff, head of Twitter’s video streaming service Vine, may also depart, as would its business development leader, Jana Messerschmidt, who has expressed unwillingness to continue further. Twitter plans to announce the departures on Monday, along with the recruitment of a new chief marketing officer, Re/code said.