[3][4] Rybalka made his senior team debut on 21 September 2011 in the Ukrainian Cup 3–2 victory against Kremin Kremenchuk.

[6] A month later, on 23 October 2011, he made his Ukrainian Premier League debut, coming on at half time in a 6-1 thrashing of Zorya Luhansk.

On 17 May 2015, in a 1-0 Ukrainian Premier League victory against Dnipro, Rybalka assisted on what became the title-clinching goal by Domagoj Vida.

[14] On 31 March 2015, Rybalka made his senior team debut for Ukraine in a friendly match against Latvia, coming on at half-time for Dynamo Kyiv teammate Denys Garmash.

[15] He became a regular player for Ukraine for the remainder of the UEFA Euro 2016 qualifying, featuring in the last six matches, including the play-offs against Slovenia.