Aioani started out as a senior at Chindia Târgoviște in 2016, aged 16, and amassed over 60 matches in the first division before moving to Farul Constanța in 2021. With the latter, he won a national title in his second season at the club.
Aioani started his senior career with Chindia Târgoviște on 9 March 2016, at age 16, recording his debut in a 7–0 Liga II thrashing of CSM Metalul Reșița.[3] He became an undisputed starter in the 2018–19 campaign, as his side achieved promotion to the Liga I by winning the second division.
Aioani's first match in the former competition came on 15 July 2019, playing the full 90 minutes in a 2–2 away draw with Gaz Metan Mediaș.[4]
Farul Constanța
On 22 June 2021, Aioani agreed to a four-year contract with fellow Liga I team Farul Constanța,[5][6] being part in a swap deal which took several players in the other direction.[note 1]
On 23 January 2024, it was announced that Aioani joined Rapid București on a three-and-a-half-year deal[10] for a rumoured fee of €400,000 plus 20% interest on a future sale.[11] Four days later, he made his debut in a 2–1 league derby win over Dinamo București.[12]
