Denys Vadymovych Shostak (; born 24 January 2003) is a Ukrainian professional footballer who plays as a central midfielder for Oleksandriya.
Mykytyshyn is a product of Vorskla Poltava and Shakhtar Donetsk youth sportive school systems. He made his debut for Mariupol in the Ukrainian Premier League in the away match against Dnipro-1 on 7 August 2021 which ended with a loss.
On 6 March 2024, Shostak was called up by Ruslan Rotan to the Ukraine Olympic football team preliminary squad as a preparation to the 2024 Summer Olympics.
In June 2024, he took part in the Maurice Revello Tournament in France with Ukraine. He wins the competition by beating Ivory Coast in final.