He earned his bachelor's degree in economics at the University College London before heading to Harvard Business School for his MBA in 2010. 

While a student there, Chew worked for a startup that "was called Facebook," he said in a post on Harvard's Alumni website. Facebook went public in mid-2012.

They are "a couple who often finish each other's sentences," according to the school's alumni page, and have three kids.

He became chief financial officer of the Chinese smartphone giant, which competes with Apple, in 2015. Chew helped secure crucial financing and led the company through its 2018 public listing, which would become one of the nation's largest tech IPOs in history. 

Before joining Xiaomi, Chew also worked as an investment banker at Goldman Sachs for two years, according to his LinkedIn profile.

He also worked at investment firm DST, founded by billionaire tech investor Yuri Milner, for five years. It was during his time there in 2013 that he led a team that became early investors in ByteDance, as the Business Chief and The Independent reported.

Chew joined ByteDance's C-suite in March 2021, the first person to fill the role of chief financial officer at the media giant.

He was named CEO of TikTok that May at the same time as Vanessa Pappas was named COO. Bytedance founder and former CEO Zhang Yiming said at the time that Chew "brings deep knowledge of the company and industry, having led a team that was among our earliest investors, and having worked in the technology sector for a decade."

That November, it was announced that Chew would leave his role as ByteDance's CFO to focus on running TikTok.

TikTok's former CEO, Kevin Mayer, had left Walt Disney for the position in May 2020 and quit after three months as the company faced pressure from lawmakers over security concerns.

Donald Trump's administration issued executive orders designed to force ByteDance into divesting its TikTok US operations, though nothing ever happened.

President Biden signed an executive order in June 2021 that threw out Trump's proposed bans on the app.

Last year, the Biden administration demanded that TikTok divest its American business from its Chinese parent company or risk being banned in the US. In response, Chew said such a divestment wouldn't solve officials' security concerns about TikTok.

"Some politicians have started talking about banning TikTok," he said. "Now this could take TikTok away from all 150 million of you."

Chew testified before Congress that month about the company's privacy and data security practices.

Wall Street said his testimony didn't do much to help his case to keep TikTok alive in the US, though Chew seemed to win over many TikTok users, with some applauding his efforts and even making flattering fancam edits of him.

The House of Representatives passed a bill on March 13 that would require any company owned by a "foreign adversary" to divest or sell to a US-based company within 180 days to avoid being banned in the US.

Chew put out a video response shortly after, asking users to "make your voices heard" and "protect your constitutional rights" by voicing opposition to lawmakers.

He called the vote "disappointing" and said the company has invested in improving data security and keeping the platform "free from outside manipulation."

"This bill gives more power to a handful of other social media companies," he added. "It will also take billions of dollars out of the pockets of creators and small businesses. It will put more than 300,000 American jobs at risk."

The Senate also passed the bill, and President Biden signed it into law in April.

In September, a hearing on the potential TikTok ban began in federal appeals court and in December, a three-judge panel from the US Court of Appeals for the District of Columbia Circuit ruled that the law is constitutional.

Trump said in a press conference on the day they met that he has a "warm spot" for TikTok, which he has criticized in the past, because he says it helped him win over young voters in the 2024 election.

Also on the day of their meeting, TikTok asked the Supreme Court to block the law that requires it be sold to avoid a shutdown, arguing that it violates Americans' First Amendment rights.

The US Supreme Court ruled on Friday that the law requiring the app's parent company, ByteDance, to divest its operations in the US or undergo a ban did not infringe on the First Amendment.

In response, Chew appeared in a video shared to TikTok's official account, during which he spoke about American TikTok users and thanked Trump.

"On behalf of TikTok and all our users across this country, I want to thank President Trump for his commitment to work with us to find a solution that keeps TikTok available in the United States," Chew said.

"This is a strong for the First Amendment and against arbitrary censorship," he added.

Trump also discussed the Supreme Court's decision on Friday with a Truth Social post.

"The Supreme Court decision was expected, and everyone must respect it. My decision on TikTok will be made in the not too distant future, but I must have time to review the situation. Stay tuned!

Chew plans to attend Trump's inauguration on Monday, a source familiar with the matter confirmed to Business Insider.

He's been seen at the Met Gala, and also posted about attending the 2023 Super Bowl and even Taylor Swift's Eras Tour.

His hobbies include playing video games like Clash of Clans and Diablo IV, golfing, and reading about theoretical physics.

Following the Supreme Court's decision to uphold the law, TikTok said in an X post it would "go dark" for American users at the deadline to sell unless Biden intervened.

"The statements issued today by both the Biden White House and the Department of Justice have failed to provide the necessary clarity and assurance to the service providers that are integral to maintaining TikTok's availability to over 170 million Americans," the post read. "Unless the Biden Administration immediately provides a definitive statement to satisfy the most critical service providers assuring non-enforcement, unfortunately TikTok will be forced to go dark on January 19."