[2] At age 17 she was casually introduced to the communications field through the program Protagonista, el cine on station Radio Sabadell, thanks to a friend.

Later she presented several programs at the station, such as Radio a la vista (together with Carlos Herrera [es] and José Manuel Parada [es]), the comedy Bruja más que bruja, the musical Con faldas y a lo loco, the interview show Café del domingo, and the magazine Sábado noche.

In 1985 she went on to direct and present the morning show Crónica del alba, which, thanks to the agreement between Radio Miramar and COPE, was broadcast from Barcelona to the whole of Spain through the network of stations of the episcopal chain.

In 1992 she presented Jocs de Nit on TV3; in 1993 she directed the contest Los cinco sentidos on Antena 3; Un paseo por el tiempo (1995) again on TVE; and on Telecinco, La semana que viene (1998), a program that was broadcast on Sunday nights.

The new owners decided to cancel Julia Otero's program, despite it being an audience favorite, replacing her with journalist Marta Robles.

On 1 June 1007 Punto Radio issued a statement announcing the termination of contractual relations with Otero, "by common accord".

Her good personal relationship with José Manuel Lara Bosch, president of Planeta Group and majority shareholder of Onda Cero, allowed her to return to the network.