Science TechnologyTwitter promotes Ali Rowghani to COO, appoints Mike Gupta as CFODaniel ClarkDecember 20, 2012July 4, 2014 by Daniel ClarkDecember 20, 2012July 4, 2014 London: The world’s famous microblogging website Twitter has appointed Ali Rowghani as new chief operating officer (COO) and Mike Gupta as new chief financial officer...