[2] The highlight of his career at Partizan was during the 2004–05 UEFA Cup group stage, when Boya scored both goals for his team in their 2–2 away draw with Lazio.
After the departure of Mugurel Buga, Ionuț Mazilu and Lucian Burdujan in the summer of 2008, Boya was considered as the club's main attacking option.
On 31 August 2010, Boya returned to Partizan and signed a one-and-a-half-year deal, after the club qualified for the 2010–11 UEFA Champions League group stage.
[6] He marked his second debut for the club by scoring two goals and providing an assist after coming on as a substitute in a 3–0 home league win over Rad on 11 September 2010.
Eventually, Boya left Partizan during the 2011 winter transfer window, after a disagreement with the club's board.