Jack Dorsey is an American businessman and programmer, known for being the co-founder and CEO of Twitter. He was born on November 19, 1976 in St. Louis, Missouri, the second child of Tim and Marcia Dorsey.
Dorsey showed interest in programming from a very young age. At age 14, he created a taxi route tracking app for his father, who was a taxi driver in San Luis. After graduating from high school, he attended the University of Missouri and then transferred to New York University, but never completed his undergraduate studies.
In 2000, Dorsey began working at a podcasting startup called Odeo. After Apple launched its own podcasting service, the company was forced to reinvent itself, and Dorsey began working on a new idea that would allow people to send short text messages via their mobile phones. That idea became Twitter, which was officially launched in 2006.
Twitter quickly became a social media phenomenon and today boasts more than 330 million monthly active users. Dorsey has been the CEO of the company on two different occasions: from its founding in 2006 to 2008, and then from 2015 to the present.
In addition to Twitter, Dorsey also founded the payments company Square in 2009. Square enables merchants to accept credit card payments through their mobile devices and has been extremely successful in the small business market. In 2020, Square's market capitalization exceeded $100 billion.
Dorsey is also known for his social activism and his interest in philanthropy. He has donated millions of dollars to various nonprofit organizations, including the Juvenile Diabetes Research Foundation and Black Lives Matter.
In short, Jack Dorsey is an American entrepreneur and programmer who co-founded Twitter and Square. He has had a significant impact on the technology industry and is known for his social activism and his philanthropy.