Born in Rovaniemi, Lapland, Poutiainen started skiing at the age of three.[2] She became junior world champion in slalom in 1997 at Schladming, Austria, and also took bronze in the super-G; she made her World Cup debut that March at Vail in the United States. At the 1999 Junior World Championships, she placed third in the giant slalom at Pra-Loup, France.
Poutiainen scored her first World Cup victory – and the first for a female Finnish alpine skier – on 28 February 2004 in a slalom held on home snow in Levi, Finland – the first alpine World Cup race to be held in the country.[2] In the 2005World Cup season, Poutiainen won the season titles in both the slalom and giant slalom, and placed fifth in the overall standings. Along the way she won three slaloms, a giant slalom and secured ten podium finishes.[2] At the 2005 World Championships, she placed second in the giant slalom behind Anja Pärson of Sweden and second in the slalom behind Janica Kostelić of Croatia – the first alpine World Championship medals for a Finnish female.[2]
The 2009 season saw Poutianen take another World Cup discipline title, in giant slalom, as well as bronzes in slalom and giant slalom at the World Championships in Val d'Isère.[2]
Poutiainen was notable for her consistency, and between January 2007 and March 2011 she successfully completed every World Cup race she entered – a total of 67.[2]
At the end of the 2014 season, Poutiainen had 11 World Cup victories, 48 podiums, and three World Cup discipline titles.[3] She was trained by Michael Bont and lives in St. Gallen, Switzerland. She announced her retirement in March 2014.[3]