These days, Whatsapp application is used by 600.000.000 people.Today I want to write about Jan Koum.He is an Ukrainian.He was born in 1976.When he was born,his family werent have hot water in their home.He worked at groccery for help to his family.He infiltrated in a hacker group.He started working on Yahoo.He met Brain Acton.Brain was the other founder group of Yahoo.When his father and mother died,he was left alone.Jan and Brain quited job and they appy for a Facebook company.They were resejted by facebook.When the company of WhatsApp were established,there were 55 employees.The averge number of pots per month per person is arond 1000 mesagges.Years later , Facebook founder bought for $19 bilion.He is rich now.
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