On 4 September 2010, Matei made his debut for Steaua's reserves in a Liga II game against Juventus București, entering in the 17th minute as they won 1–0.

In January 2016, Matei moved abroad for the first time after joining Greek club Atromitos for an undisclosed transfer fee.

[9] He resumed trainings the following month after Rednic's dismissal, but Dinamo continued its poor results which led to the first relegation in the club history.

Matei became the first player to depart Dinamo after the relegation, only three days after featuring 73 minutes in the decisive promotion/relegation play-off match against Universitatea Cluj.

[10] On 2 June 2022, shortly after Dinamo București's relegation, Matei remained in the Liga I by signing a two-year contract with Sepsi OSK.