Twitter users can partly thank Jack Dorsey for his co-creation of the popular microblogging site. Dorsey (born 19 November 1976), an American computer programmer, is best known as the entrepreneur and co-founder as well as current CEO of Twitter. He is also the developer and current CEO of Square, a company that specializes in mobile payments.
His notable contributions to modern society have resulted in recognitions from various organizations. He was named as one of the world’s top 35 innovators under the age of 35 by the MIT Technology Review TR35 as well as the 2012 “Innovator of the Year Award” for technology by The Wall Street Journal.
Dorsey had a pivotal role in the early days of development of Twitter, Inc. As its CEO, he oversaw two rounds of funding by venture capitalists. His career at Twitter, however, had its ups and downs.
On October 2008, he was replaced as CEO and became chairman of the board. On March 2011, he became its Executive Chairman and then became Interim CEO on July 2015 upon the resignation of Costolo. He was named permanent CEO on October 2015.
As Twitter grew in popularity, he made several changes that reinforced Twitter’s online status. He made uptime a top priority, thus, over-creating revenue; until 2008, Twitter’s design was not for earning revenue. He described Twitter’s commercial use and API as the aspects that can result in paid features, a boon to the microblogging site. His three guiding principles as Twitter increases in scope and revenue: constraint, craftsmanship, and simplicity.
Dorsey is also the developer behind Square, a business platform designed to accept debit and credit card payments using a dedicated mobile device. The square-shaped device can be attached to iOS and Android devices, which can then be used for mobile payments – the user swipes the mini card reader, chooses an amount for transfer to a recipient, and signs his name for confirmation.