In March 2016, he made his senior debut for the Ukraine national team.
He made his debut for the main FC Zorya team as a substitute in the second half in a match against Shakhtar Donetsk in the Ukrainian Premier League on 2 October 2011.
On 9 July 2018, Petryak moved to the Hungarian club Ferencvárosi TC.
In July 2019 Petryak moved to the Hungarian club Fehérvár FC.
This biographical article related to a Ukrainian association football midfielder born in the 1990s is a stub.