english: Brian Acton, an engineering manager who was rejected by both Twitter and Facebook before cofounding WhatsApp, the mobile messaging platform that would sell for 19 billion dollars.
non_english: Mühendislik yetkilisi Brian Acton piyasa değeri 19 milyar dolar olan mesajlaşma platformu Whatsapp'ın eş kurucusu olmadan önce hem Twitter hem de Facebook tarafından reddedilmişti.