Tchoumitcheva began modelling at the age of 12, and became famous in her hometown. When she entered the national "Miss Switzerland" pageant in 2006. After the contest she was considered the "most eligible single woman in Switzerland". In May 2009 she was elected as the Best Bikini Body, according to a survey by the magazine Schweizer Illustrierte. In 2012 she was featured with a photoshoot and personal interview in the Spanish GQ magazine.
In December 2012, the Swiss edition of Maxim magazine graced her with the cover and its annual title of "Most Beautiful Woman of the Year".
Tchoumitcheva has worked with several modelling agencies including Option Model Agency (Zurich), Oxygen Models, Tess Management, and Elite Model Management (Barcelona and Miami).
Xenia has been elected as one of the 99 most influential women in the world for 2016, according to the AskMen annual list for the category influencers. As a digital influencer, she collaborates with names of the likes of Ferragamo, Dior and Vogue. In fall 2016 she shot fashion editorials with magazines of the likes of ELLE, Vanity Fair and L'Officiel.
Xenia gives regular public speeches at universities and conferences about her online business, brand creation and, most often, female leadership.
Tchoumitcheva began to work in commercials and music videos in 2007 (e.g. "Candino-Festina"). She starred in the short movie Les Enfants de la Honte of the French film maker Alain Margot, which appeared on the NIFF film festival.
She was in the music video with Italian-Swiss singer Paolo Meneguzzi in May 2010. In June 2011 she was supporting role in the short film Lines.
In January 2011, Tchoumitcheva finished shooting a role as a rockstar in the French cinema production Bob et Les Sex Pistaches starring the French actor Jules Sitruk. She also appeared in the film Without Men with Eva Longoria and Christian Slater in 2011.
Tchoumitcheva has modelled for different brands including Visilab Sunglasses, Audi, Burger King and Casino Lugano.
In 2012 she was the official face of the Spanish airline AirEuropa, Revlon cosmetics and Nikon cameras.
In 2015 Xenia becomes the official brand ambassadress for Swiss Smile luxury products. She also collaborated for her blog as the official fashion influencer with the Pirelli Calendar 2015, together with Scott Schumman from the blog The Sartorialist.
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In 2016 Xenia's yearly partnership with the luxury watch brand IWC was announced.
As of 2015, Xenia has changed her official public name to the shortened version Xenia Tchoumi, as it's internationally easier to pronounce
She was born on 5 August 1987 in Magnitogorsk, Russia.