Both Reza and his younger brother, Morteza,[1][2] therefore developed an early interest in music and later pursued careers as musicians.

Mahjubi's first teacher was Hossein Hang Afarin, an army music officer.

Instead, he trained with Hossein Khan Esmail Zade, a master player of kamancheh, from whom Mahjubi also learned to play the violin.

At 25 Mahjubi began to teach music classes; he continued composing new works and performing concerts at the same time.

Reza Mahjubi died at the age of 56, on 20 July 1954, and was buried in Zahiroddole cemetery.