Born in Rome, capital of Lazio, Aya started his career at "Roma Team Sport", a club which sign an partnership agreement with A.S. Roma. In 2005, he was selected to Lazio region U15 representative team, as a midfielder.
Fiorentina (youth)
In 2006, he moved to ACF Fiorentina's Allievi U17 team, rejoining fellow Lazio representatives Federico Masi. Aya was promoted to the reserve in 2007–08 season, which he only entered the play-offs round once in 2008. The team lost to Sampdoria in semi-finals. Fiorentina reserve failed to enter Campionato Nazionale Primavera playoffs in 2009 and 2010. Since 2008 Aya also received a shirt number from the first team, No.43 and no.41 in 2009–10. Aya was eligible to UEFA List B criteria since 2008, thus he was included in the List B squad for Viola in 2008–09 and 2009–10 UEFA Champions League. Aya played twice for the first team in post-season friendly in 2009 and 2010.
In June 2010 Aya left for Reggiana in co-ownership deal along with Samuele Bettoni, for €200,000 and €500 respectively. Co-currently, Marco Romizi and Lorenzo Morelli returned to La Viola for €200,000 and €150,000 respectively. Thus, Fiorentina paid the Emilia minor club €149,500 in net before the end of 2009–10 financial year of Reggiana, as a de facto incentive to act as a farm for Viola. In August 2010 Reggiana signed Piergiuseppe Maritato for €500. Aya made 23 starts in 2010–11 Lega Pro Prima Divisione. In June 2011 Fiorentina bought back Viola youth product Niccolò Manfredini,, Aya, Samuele Bettoni and Maritato from Reggiana, co-currently sold Reggiana youth product Matteo Arati back to Reggio Emilia for €180,500. It made Reggiana received €350,000 in net before the end of 2010–11 season. On 13 August Maritato was sold to Vicenza in co-ownership deal for a peppercorn fee of €500. Aya followed the footsteps of Maritato to leave Florence on 31 August 2011 also for €500 in co-ownership deal. The club failed to find a buyer for its youth product, which Aya forced to returned to Reggiana. Fiorentina failed to sell Bettoni, N.Manfredini, and Edoardo Pazzagli who did not play any game in 2011–12 season. In the second season with Reggiana, Aya made 30 starts in 2011–12 Lega Pro Prima Divisione. On 23 June he is purchased entirely by Reggiana.
On 21 January 2020, he joined Serie B club Salernitana on loan until the end of the 2019–20 season, with Salernitana holding an obligation to purchase his rights at the completion of the loan term.
