In the Teatro Español he performed in Don Juan, El loco de los balcones, and Jose Ramón Fernández's Yo soy Don Quijote de la Mancha as Sancho Panza, sharing the stage with José Sacristán.

Soto's work as an actor in film includes appearances in Daniel Monzón's Celda 211; Paco León's Kiki, el amor se hace; Ángeles González Sinde's Una palabra tuya and La suerte dormida; Imanol Uribe's Miel de naranjas; Alberto Rodríguez's After; Eduardo Chapero-Jackson's Verbo; Julien Leclerq's The Informant; and Álex de la Iglesia's Balada triste de trompeta.

On television Soto has been engaged in series like La casa de papel, Amar es para siempre, La Catedral del mar, Isabel, Alatriste, Homicidios, Vive camtando, la pecera de Eva, Frágiles, Sin tetas no hay paraíso, Doctor Mateo, Hospital Central, Aída, Vientos de agua, La que se avecina, El ret, Mi gitana, Amar es para siempre, Cuestión de sexo, La señora, Guante blanco, La princesa de Eboli, Mario Conde (los días de gloria), and Los Serrano.

As a director, Soto has been behind plays like La estupidez by Rafael Spregelburd; Drac Pack by Najwa Nimry, Carlos Dorrego and Emilio Tomé; Constelaciones by Nick Payne; El minuto del payaso, Babilonia, and Las Cervantas by Jose Ramón Fernández and Inma Chacón; Taxidermia de un gorrión by Oskar Galán; Onán by Nacho Faerma; Tarinspotting Harry Gibson; Bailar en la oscuridad, an adaptation of a Lars Von Tier film; Autopsia by Jose Manuel Mora; Rulos and Prohibido besar by Ángeles González Sinde; Hamster by Santiago Cortegoso; and La virtuz de la torpeza and Delirare by Cristina Redondo.

Soto has also taken part in shows for the National Heritage such as productions by EscenaTe, directing in places like El Museo del Prado, Jardín del Capricho and La Muralla de Ávila.