Born in São Félix do Araguaia, Mato Grosso, Fernandes scored three consecutive wins in the Copa América de Ciclismo in 2005, 2006 and 2007. She competed in the Women's road race at the 2008 Summer Olympics, finishing in 51st place. At the 2012 Summer Olympics in the Women's road race, finishing 23rd, and in the Women's time trial, finishing 18th.