Uber Technologies Inc. said Chief Financial Officer Brent Callinicos is leaving the car-hailing startup.

Callinicos, who joined Uber in 2013 from Google Inc., had built up financial operations in more than 53 countries during his tenure, Chief Executive Officer Travis Kalanick wrote in an e-mail to the company Monday. The former CFO said in an e-mail that he’s leaving to spend more time with his wife and daughter.

Uber has become one of the world’s largest private transportation companies with a mobile application for ordering rides. To fuel the expansion, Kalanick has raised an enormous amount of cash totaling more than $5 billion and valuing the company at $40 billion.

“The Uber journey has been exciting and entrepreneurial in every dimension,” Kalanick said in the statement. “It is rewarding but is also demanding, taking significant endurance from everyone on the team.”

Callinicos will remain at Uber as an adviser during the transition, while Gautam Gupta will become interim head of finance, Uber said.

This article was written by Sarah Frier from Bloomberg and was legally licensed through the NewsCred publisher network.

Tags: execs, uber
Photo Credit: Calling is has helped oversee the financial complexities of Uber's overseas expansion.