Expósito's first recurring television role was as Ruth in the first season of the TVE series Estoy vivo, which aired in 2017.

[13] She then gained international attention for her role in the 2018 Netflix teen drama series Élite, in which she portrayed Carla Rosón Caleruega until 2020.

[4] After the success of the series, she made her big screen debut with leading roles in the 2018 films When Angels Sleep, as Silvia, and Your Son, as Andrea.

Later that year, Expósito had a recurring role in the limited television series, Veneno, on Atresplayer Premium, playing Machús Osinaga, a journalist from the talk show Esta noche cruzamos el Mississippi.

directed by Dani de la Orden, and starring Paco León and Miren Ibarguren.