Peter Olayinka Oladeji (born 18 November 1995) is a Nigerian professional footballer who plays as a left winger or forward for Serbian club Red Star Belgrade and the Nigeria national team.

He was promoted to the senior team under Agim Canaj during the 2012–13 season, and he made his professional debut on 20 October 2012 in an Kategoria Superiore game against Luftëtari, in which he came on as an 84th-minute substitute for Jetmir Sefa in the 2–0 win.

He scored 8 league goals in 21 games to help the club win the Süper Lig for the first time in 20 years.

His transfer to Skënderbeu was heavily disputed by Kukësi and its president Safet Gjici, who also appealed the move to the Albanian Football Association and reported the player to the police.

[7][8] He returned to Albania in August before the start of the 2015–16 Kategoria Superiore, season and rejoined Skënderbeu, where he was allowed to play once again after serving his suspension.

[12] In the evening of 9 January 2023, Red Star Belgrade and Olayinka agreed on the transfer, which will become active after the end of Peter's contract with Slavia.