• Barcelona Cabs Strike Against Uber Taxi App
  • BARCELONA, SPAIN - JULY 01: In this photo illustration, the app 'Uber' is launched in a smart phone on July 1, 2014 in Barcelona, Spain. Taxi drivers in main cities strike over unlicensed car-halling services. Drivers say that is a lack of regulation behind the new app. (Photo Illustration by David Ramos/Getty Images)
  • Image Credit: David Ramos via Getty Images
  • Mideast Egypt Uber
  • Anthony Khoury, head of Middle East and Africa expansions for Uber, displays the application on a mobile phone during an event to celebrate the official launch of the car-hailing service in Cairo, Egypt, Tuesday, Feb. 10, 2015. Cairo soft launched the company in Nov. 2014. Uber is now in over 270 cities in 55 countries, according to the company. (AP Photo/Mosa'ab Elshamy)
  • Image Credit: ASSOCIATED PRESS
  • Uber Surge
  • This Friday, Nov. 21, 2014, photo taken in Newark, N.J., shows smartphones displaying Uber car availability in New York. Uber is offering car service in 250 cities in 50 countries now, up from 60 cities in 21 countries just a year ago. Uber hasnâ??t released its financial figures to the public, so valuing the company is pure guesswork. (AP Photo/Julio Cortez)
  • Image Credit: ASSOCIATED PRESS
  • India Uber Asia
  • In this April 3, 2014 photo, a smartphone is mounted on the glass of an Uber car in Mumbai, India. Riding on its startup success and flush with fresh capital, taxi-hailing smartphone app Uber is making a big push into Asia. The company has in the last year started operating in 18 cities in Asia and the South Pacific including Seoul, Shanghai, Bangkok, Hong Kong and five Indian cities. (AP Photo/Rafiq Maqbool)
  • Image Credit: TENGKU BAHAR via Getty Images
  • Grand Tasting Presented By ShopRite Featuring KitchenAid® Culinary Demonstrations Presented By MasterCard - Food Network New York City Wine & Food Festival Presented By FOOD & WINE
  • NEW YORK, NY - OCTOBER 18: A general view of atmosphere at the Uber Technologies station at the Grand Tasting presented by ShopRite featuring KitchenAid® culinary demonstrations presented by MasterCard during the Food Network New York City Wine & Food Festival Presented By FOOD & WINE at Pier 94 on October 18, 2014 in New York City. (Photo by Bryan Bedder/Getty Images for NYCWFF)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location at Puerta de Alcala Square on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location at Atocha Station on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location next to a taxi lane on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Adam Berry via Getty Images
Ridesharing company Uber said Monday that CFO Brent Callinicos is leaving the company to spend more time with his family.

Uber said Gautam Gupta, its head of strategic finance, will be in charge of its finances while it looks for a permanent replacement. It said Callinicos will continue to advise Uber.

The San Francisco company announced Callinicos' departure in an email from CEO Travis Kalanick.

In an email to Uber employees, Callinicos said he has worked nonstop since receiving his MBA 26 years ago and wants to spend more time with his wife and daughter. Uber hired Callinicos in September 2013. He worked at Google for seven years and was treasurer and chief accountant before joining Uber. He also worked for Microsoft for 14 years.

Uber is a taxi alternative company that lets passengers summon cars through an app, linking would-be riders directly to nearby drivers. It operates in more than 50 countries and is valued at $40 billion. However it faces a variety of legal and regulatory challenges as it expands.

The company has been criticized for the thoroughness of its background checks on drivers and other safety issues, as well as its method of raising prices when demand goes up.

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The AP contributed to this report.

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