After joining Rosario Central in 2013, Alfani began his senior career with the club in late-2016 when he was an unused substitute for league matches with Olimpo and Lanús; which preceded his professional debut on 18 December during a victory against Belgrano.[2][3] He subsequently made three further appearances in all competitions during 2016–17.[2][4] In November 2017, Alfani was loaned to Primera B Nacional team Villa Dálmine.[5][6] In January 2019, Alfani was announced as a new signing for Santos in the Peruvian Segunda División.[2] He scored his first senior goal on 26 May in a 2–0 win over Atlético Grau.[2]