At the age of nineteen, after two years of drama studies, he obtained his first role in the telenovela Para toda la vida (1996). He later participated in 1997, in the music video Corazón by Lynda Thomas, the telenovela Pueblo chico, infierno grande (with Verónica Castro and directed by José Alberto Castro), El Alma no Tiene Color (directed by Juan Osorio) Desencuentro (directed by Ernesto Alonso), Rencor Apasionado (directed by Lucero Suárez), Camila (directed by Angelli Nesma) and Soñadoras his first lead and breakthrough role. In April 2000 Becker concluded shooting the telenovela Mujeres Engañadas.
In cinema he provided the voice of Cale, Tobias and Lightning McQueen for the Spanish-dubbing of animated films Titan A.E., The 3 Wise Men and Disney's Cars. He also appeared in the 1997 film La Primera Noche. In 2002 Becker starred in the film La Hija del caníbal (Lucía, Lucía) opposite the Argentine actress Cecilia Roth. Later he starred opposite Antonio Banderas and Oscar winner Emma Thompson in the drama-thriller Imagining Argentina. Becker also starred in the historical Kazakhstani epic Nomad filmed in 2004. The production took two years to make and it hit screens in 2006. He also starred in ESL: English as a Second Language with Maria Conchita Alonso and Soledad St. Hilaire released in 2005. He also landed the lead role of Santiago Munez in the Disney football feature films Goal! in 2005 and Goal! 2: Living the Dream... in 2007 which became the most well known football movies in the world. He also appeared briefly in Goal III: Taking on the World in 2009.