Vähämaa started skating at age four.[1] She made her senior international debut at the 2007 Finlandia Trophy, which she won. She missed the 2008 Finnish Championships due to a time conflict with the Junior Grand Prix Final. She qualified for the 2008 Europeans from her scores at other competitions. It was her first senior ISU Championships. She placed 10th.
Vähämaa turned fully senior for the 2008–2009 season. She placed 8th at the 2008 Skate Canada International. She had been assigned to the 2008 Cup of Russia but withdrew before the event due to injury. She missed the rest of the season because of injury.