He received the Revelation Award at Spain's National Music Competition for kids when he was just nine years old. For over four years, Mateo performed regularly at the television show Menuda Noche on the Canal Sur TV of Andalucia. In 2009, at the age of ten, he was signed to EMI Music Spain and, in December of that year, its self-titled debut album, Abraham Mateo, was released in Spain. In 2012, Mateo was signed to Sony Music Spain, releasing his second studio album, AM, in November 2013. With the single "Señorita", he made his breakthrough in the musical scene, achieving a great success in the social networks. The music video for "Señorita" was the most trending music video of 2013 in YouTube Spain. In November 2014, Mateo released his third studio album, Who I AM, in Spain and Latin America. It debuted at number one in México and Spain. His albums have received one Platinum and two Gold certifications by Promusicae, the association that represents the recording industry in Spain.
He was the opening act for the British boyband One Direction in Peru, Chile and Spain as part of their 2014's Where We Are Tour. Mateo was nominated for the 2013 Premios Juventud in the category "Best New Artist". The awards are presented in Miami, Florida by the American Spanish-language television network Univisión.