Although born in Germany, Nikos Ioannidis moved to Greece at a very early age and made his first football steps in Pandramaikos. Olympiacos initially showed interest and signed the player, who was included in the youth team of Olympiacos.
On July 2013 Germany's third division club Hansa Rostock has reached an agreement with the Greek football champion Olympiakos on a perpetual strategic partnership and borrowed in the course of the cooperation of the Greek Under-19 national team Nikolaos Ioannidis for a year. "In Greece there are no full-scale substructure in the form of second teams," said Rostock's sporting directorUwe Vester on Monday. "At this point we come into play, because highly talented, young players can so help us on our way and simultaneously collect valuable experience for their own careers."
After the departure of Fred Benson and Guyon Fernandez, PEC Zwolle was shy about attacking reinforcements. Eventually the cup holder hires Ioannidis who will plays on loan for the club in the Dutch Eredivisie since the season 2014/2015. His loan was ended on 9 January 2015, after a lack of prospect.
On 15 January 2015, Ioannidis is back in the 3. Liga. The striker, who played last season 30 games for Hansa Rostock, signed a contract with Borussia Dortmund II. This provides that the 20-year-old Greek until June 2016 on loan from Olympiacos Piraeus. Ioannidis was on loan to PEC Zwolle played only four league games and a game in the Europa League. He is still under contract with Olympiakos until 2019.
Asteras Tripolis
officially announced the signing of 22-year-old Greek striker Nikos Ioannidis until the summer of 2018, for an undisclosed fee. In his 10th appearance with the club, in a 2-1 home game against Veria, he scored a brace, sealing the victory for his club. On 1 July 2017, Ioannidis had mutually solved his contract with the club.
Diósgyőr
officially announced the signing of the Greek striker until the summer of 2020, for an undisclosed fee. On 16 September 2017, he scored his first goal with the club in a 2-4 home loss game against Paksi FC.
On 2 September 2018, the Portuguese club Marítimo officially announced the signing of the Greek striker until the summer of 2021, for an undisclosed fee.
