[2][3] She is known for her roles as Dodge in the Netflix series Locke & Key, Cruz Manuelos in the Paramount+ spy series Lioness, Veronica in the drama film Guest of Honour, and Becky DeMuth in the horror film In the Tall Grass.

She studied drama and dance at Rosedale Heights School of the Arts, and once she went to college, she finally acquired an acting agent.

[5] In August 2018, De Oliveira was cast as Becky DeMuth in the Netflix horror film In the Tall Grass, directed by Vincenzo Natali and based on the novella by Stephen King and Joe Hill.

[9] De Oliveira was announced to be in another adaptation of Joe Hill's work in February 2019, as the antagonist role of Dodge in the Netflix series Locke & Key, based on the graphic novels of the same name.

De Oliveira was inspired by Angelina Jolie's performance as the title character in Maleficent for her portrayal of Dodge.