Dorsey began programming while attending Bishop DuBourg High School in St. Louis.
VineAt age 15, Dorsey wrote dispatch software that is still used by some taxi companies.
Source: Bio.
When he wasn't checking out specialty electronics stores or running a fantasy football league for his friends, Dorsey frequently attended punk-rock concerts.
@jackThese days Dorsey doesn't favour the spiky hairdo.
Source: The Wall Street Journal
Like many of his fellow tech billionaires, Dorsey never graduated college.
edyson / FlickrHe briefly attended the Missouri University of Science and Technology and transferred to New York University before calling it quits.
Source: Bio.
In 2000, Dorsey built a simple prototype that let him update his friends on his life via BlackBerry and email messaging.
joi / FlickrNobody else really seemed interested, so he put away the idea for a bit.
Source: The Unofficial Stanford Blog
Fun fact: Jack Dorsey is also a licensed masseur.
Getty Images/Bill PuglianoHe got his license in about 2002, before exploding onto the tech scene.
Sources: The Wall Street Journal
He got a job at a podcasting company called Odeo, where he met his future Twitter cofounders.
Odeo went out of business in 2006, so Dorsey returned to his messaging idea, and Twitter was born.
On March 21, 2006, Dorsey posted the first tweet.
Dorsey kept his Twitter handle simple, "@jack."
Dorsey and his cofounders, Evan Williams and Biz Stone, bought the Twitter domain name for roughly $7,000.
Khalid Mohammed / AP ImagesDorsey took out his nose ring to look the part of a CEO. He was 30 years old.
A year later, Dorsey was already less hands-on at Twitter.
By 2008, Williams had taken over as CEO, and Dorsey transitioned to chairman of Twitter's board. Dorsey immediately got started on new projects. He invested in Foursquare and launched a payments startup called Square that lets small-business owners accept credit card payments through a smartphone attachment.
In 2011, Dorsey got the chance to interview US President Barack Obama in the first Twitter Town Hall.
Dorsey had to remind Obama to keep his replies under 140 characters, Twitter's limit at the time.
Source: Twitter
Twitter went public in November 2013, and within hours Dorsey was a billionaire.
APIn 2014 Forbes pegged Dorsey's net worth at $2.2 billion. On the day it was reported he was expected to resign, Bloomberg's Billionaires Index calculated his net worth at $12.3 billion.
It was revealed in a 2019 filing that Dorsey earned just $1.40 for his job as Twitter CEO the previous year.
The $1.40 salary actually represented a pay rise for Dorsey, who in previous years had refused any payment at all.
He's far from the only Silicon Valley mogul to have taken a measly salary - Mark Zuckerberg makes $1 a year as CEO of Facebook.
Source: Insider
He might have been worth more had he not given back 10% of his stock to Square.
This helped Square employees, giving them more equity and stock options. It was also helpful in acquiring online food-delivery startup Caviar.
With his newfound wealth, he bought a BMW 3 Series, but reportedly didn't drive it often.
Alex Davies / Business Insider"Now he's able to say, like, 'The BMW is the only car I drive, because it's the best automotive engineering on the planet,' or whatever," Twitter cofounder Biz Stone told The New Yorker in 2013.
Source: The New Yorker
He also reportedly paid $9.9 million for this seaside house on El Camino Del Mar in the exclusive Seacliff neighborhood of San Francisco.
The Real Estalker via Sotheby'sThe house has a view of the Golden Gate Bridge, which Dorsey views as a marvel of design.
Source: Insider
Before the pandemic, Dorsey said he worked from home one day a week.
In an interview with journalist Kara Swisher conducted over Twitter, Dorsey said he worked every Tuesday out of his kitchen.
He also told Kara Swisher that Elon Musk is his favorite Twitter user.
Dorsey said Musk's tweets are, "focused on solving existential problems and sharing his thinking openly."
He added that he enjoys all the "ups and downs" that come with Musk's sometimes unpredictable use of the site. Musk himself replied, tweeting his thanks and "Twitter rocks!" followed by a string of random emojis.
Both Musk and Dorsey are crypto enthusiasts, and appear to have developed a good public relationship.
Source: Insider
Facebook CEO and rival Mark Zuckerberg once served Jack Dorsey a goat he killed himself.
Gene KimDorsey told Rolling Stone about the meal, which took place in 2011. Dorsey said the goat was served cold, and that he personally stuck to salad.
Source: Rolling Stone
His eating habits have raised eyebrows.
Phillip Faraone/Getty Images for WIRED25Appearing on a podcast run by a health guru who previously said that vaccines caused autism, Dorsey said he eats one meal a day and fasts all weekend. He said the first time he tried fasting it made him feel like he was hallucinating.
"It was a weird state to be in. But as I did it the next two times, it just became so apparent to me how much of our days are centered around meals and how — the experience I had was when I was fasting for much longer, how time really slowed down," he said.
The comments drew fierce criticism from many who said Dorsey was normalizing eating disorders.
In a later interview with Wired, Dorsey said he eats seven meals a week, "just dinner."
In the early days of Twitter, Dorsey aspired to be a fashion designer.
Cindy Ord / Getty Images, Franck MichelDorsey would regularly don leather jackets and slim suits by Prada and Hermès, as well as Dior Homme reverse-collar dress shirts, a sort of stylish take on the popped collar.
More recently he favors edgier outfits, including the classic black turtleneck favored by Silicon Valley luminaries like Steve Jobs.
Sources: CBS News and The Wall Street Journal
He also re-introduced the nose-ring and grew a beard.
GettyDorsey seems to care less about looking the part of a traditional executive these days.
Singer Azealia Banks claimed to have been sent clippings of Dorsey's beard hair to fashion into a protective amulet, although Dorsey denied this happened.
In 2016, Banks posted on her now-deleted Twitter account that Dorsey sent her his hair, "in an envelope." Dorsey later told the HuffPo that the beard-posting incident never happened.
In September 2018, Jack Dorsey was grilled by lawmakers alongside Facebook COO Sheryl Sandberg.
Dorsey and Sandberg were asked about election interference on Twitter and Facebook as well as alleged anti-conservative bias in social media companies.
Source: Insider
Dorsey testified before Congress once again on October 28, 2020.
Dorsey appeared via videoconference at the Senate hearing on Section 230, a part of US law that protects internet companies from legal liability for user-generated content, as well as giving them broad authority to decide how to moderate their own platforms.
In prepared testimony ahead of the hearing, Dorsey said stripping back Section 230 would "collapse how we communicate on the Internet," and suggested ways for tech companies to make their moderation processes more transparent.
During the hearing, Dorsey once again faced accusations of anti-conservative bias
The accusations from Republican lawmakers focused on the way Twitter enforces its policies, particularly the way it has labelled tweets from President Trump compared to other world leaders.
Dorsey took the brunt of questions from lawmakers, even though he appeared alongside Facebook CEO Mark Zuckerberg and Google CEO Sundar Pichai.
Source: Protocol
During the hearing, the length of Dorsey's beard drew fascination from pundits.
Some users referred to Dorsey's facial hair as his "quarantine beard," while others said it made him look like a wizard.
"Jack Dorsey's beard is literally breaking Twitter's own face detection," posted cybersecurity blogging account @Swiftonsecurity.
When he's not in Washington, Dorsey regularly hops in and out of ice baths and saunas.
Dorsey said in the "Tales of the Crypt" podcast that he started using ice baths and saunas in the evenings around 2016.
He will alternately sit in his barrel sauna for 15 minutes and then switch to an ice bath for three. He repeats this routine three times, before finishing it off with a one-minute ice bath.
He also likes to take an icy dip in the mornings to wake him up.
Source: CNBC
Dorsey's dating life has sparked intrigue. In 2018, he was reported to be dating Sports Illustrated model Raven Lyn Corneil.
Sports Illustrated Swimsuit / YouTube / GettyPage Six reported in September 2018 that the pair were spotted together at the Harper's Bazaar Icons party during New York Fashion Week. Page Six also reported that Dorsey's exes included actress Lily Cole and ballet dancer Sofiane Sylve.
Source: Page Six
Dorsey said Square was launching a new bitcoin business in summer 2021.
Dorsey announced the new venture in a tweet on July 15, 2021 and said its name was "TBD." It wasn't clear whether that was its actual name, or Dorsey hadn't decided on a name yet.
Via PakApNews