Malacarne started training after inspiration from Monica Brant and participated in the 2005 IFBBAmateur BodyFitness Championships in São Paulo, where she earned her IFBB Pro Card. She moved to the United States in 2007 and competed at various fitness and physique competitions. She won the New York Pro Championship Women's Physique category in 2012, 2013, and 2014. She participated in the 2014 Olympia Women's Physique Showdown, defeating defending champion Dana Linn Bailey by a small margin, and went on to win the contest again in 2015, 2016, and 2017.