[4] The title track El Dorado was featured in Cafe Del Mar XXV Compilation album.
[9] In 2020, Varillas worked with legendary Afrobeat drummer Tony Allen on his single Saving Grace, they recorded together at RAK Studios in London.
[11] Rolling Stone chose his song ‘Give a Little Love’ from his album El Dorado as their #1 most beautiful undiscovered 2020 summer hit of the moment.
[14] In 2022, Varillas worked with Grammy award-winning producer and engineer Noah Georgeson on his song 'A New Dawn'.
[18] During his live appearances, Varillas opened for Brazilian musician Seu Jorge, Mexican guitarists Rodrigo y Gabriela,[19] Latin singer Natalia Lafourcade,[20] Julieta Venegas,[21] French singer Zaz,[22] and Italian singer-songwriter Jack Savoretti across Europe.