Most of his compositive output dates after his return to Italy, and only a handful compositions of doubtful attribution date back to his permanence in Germany. His main genre was ballet, nevertheless it is hard to formulate a judgment on the quality of his production, since most of his music did not survive and few critic judgments from his era are known. Between 1775 and 1777 he wrote six ballets, and in 1778 two ballets for the Teatro Comunale in Florence and one opera for Stuttgart. In 1779 he became concertmaster and director at Teatro alla Scala, position he maintained for 23 years. Between 1783 and 1788 he wrote seven ballets for La Scala, and in the same period he was also concertmaster at the Pio Istituto de' Professori di Musica. In 1797, under the French occupation, he wrote a ballet of republican inspiration. In 1802 he was arbiter in a controversy between the theatre management and the orchestra. In 1803 he left his position at La Scala, where he was replaced by Alessandro Rolla. Baillou died in Milan in 1804 and was buried in Cimitero di San Gregorio, demolished in the end of XIX century. His last ballet, "La disfatta di Abderamo", was premiered posthumous in 1809. Several of his children and grandchildren became musicians and worked at La Scala.