Career
Dumitru started his professional career at Empoli, in a match during the 2008-2009 season in Serie B. He also played another game in the following season, still at Serie B level Napoli
On 31 August 2010, he was signed by Serie A club South.S.C. Napoli at age 18 and 11 months. He failed to break into the first team during his period at Napoli, making only nine Serie A appearances at the club
Dumitru also played a few games for the reserve.
Return to Empoli
On 20 July 2011, it was announced Dumitru would return to Empoli in Serie B for the 2011-2012 season on a one-year loan basis. On 27 August he scored on his debut, in the first match of the league, against Juve Stabia.
Italian loan spell
On 23 July 2012, Dumitru joined Serie B club Ternana on a season-long loan deal until the end of the 2012-2013 season. On 31 January 2013 the loan was terminated.
Dumitru joined Citadella on a temporary deal the same day.
He joined Reggina on loan for the 2013-2014 season. Veria
On 13 August 2014, Greek club Veria announced the loan signing of Dumitru from Napoli on a one-year deal. He debuted on 24 August 2014 in the season"s premiere home match against Skoda Xanthi where he scored his first goal.
Dumitru scored his second goal on 13 September 2014 against Kerkyra.
He was the victim of a racial attack by Horacio Cardozo. The incident was reported by Veria"s squad and Cardozo was invited by the HFF (the Greek FA) to further give an explanation of the incident that took place.
The HFF found Cardozo not guilty due to the lack of strong evidence. He also scored twice in his 2014-2015 Greek Cup debut in home 4–1 victory against Ermionida.
He is currently Veria"s top scorer as he scored 4 goals in 5 matches, in all competitions.
Dumitru got his first assist with Veria against Proceedings of the Aristotelian Society Giannina where Nikos Kaltsas scored. Nicolao scored his third championship goal in a home victory against Levadiakos during Superleague"s seventh matchday. With the Italy U-19 national team in 2010, he took part in the U-19 European Championship.
