Giani started his career at
Inter Milan. In August 2005, he was loaned to Serie B
Cremonese, but later returned to Inter and played in the 2006
Torneo di Viareggio. He then played two Serie C1 seasons for
Pro Patria. In July 2008, he joined
Vicenza in a
joint-ownership deal and
Jean Mbida joined opposite direction. Giani was valued at €1,000, thus half of the rights were worth €500; Mbida was valued at €120,000, and the half was worth €60,000. Giani's co-ownership deal was renewed in June 2009, 2010 and 2011. In June 2012, Inter gave up the remaining 50% registration rights. On 23 January 2013, Giani was signed by
Perugia in a temporary deal. On 9 January 2014, Giani was signed by
SPAL, with
Erik Panizzi moving in the opposite direction. On 30 January 2019, he signed a 2.5-year contract with
Serie C club
FeralpiSalò. On 9 August 2021, he joined
Serie D club Desenzano Calvina. ==Death==