A product of the Atalanta youth system, Bianchi made his Serie A debut at the age of 18 during the 2000–01 Serie A season. He played the final 10 minutes in a 2–1 loss to Juventus on 17 June 2001. His only appearance during the season. The following season he made an additional 3 appearances for the "bergamaschi", while during the 2002–03 Serie A season he made 16 appearances. Despite being a prolific scorer in the youth ranks, he played 21 games for the first team without scoring any goals.