In 1930 he made his professional debut with an outfit led by Antonio Polito that played on Radio Belgrano. The following year he made a great move by joining the Roberto Firpo Orchestra as violin player. But with Osvaldo Fresedo is when Sassone would find his way of feeling tango. That would mark him forever. In 1935, after he split with "El Pibe de la Paternal", Florindo put together his first orchestra, debuted on January 1, 1936 on Radio Belgrano and played at the café Nacional and the Marabú cabaret, with Alberto Amor on vocals.