Born in Manaquiri, Amazonas,[2] Marília began her career with local side Iranduba.
[3] On 8 January 2021, Marília signed with Cruzeiro.
[4] On 6 January 2024, after establishing herself as a starter, she renewed her contract for a further season.
[5] On 20 October 2024, Marília was called up to the Brazil national team by head coach Arthur Elias for two friendlies against Colombia.
[6] She made her full international debut nine days later, starting and providing the assist to Giovana Queiroz's goal in a 3–1 win at the Estádio Kleber Andrade.