[1] He debuted on the ISU Junior Grand Prix series in September 2008, in Ostrava, Czech Republic.

[4] Making his last international appearance for Ukraine, he placed 11th at the Winter Universiade, held in December 2013 in Trento, Italy.

Reznichenko debuted internationally for Poland at the 2016 CS Ondrej Nepela Memorial, held in late September and early October 2016, and finished 9th.

Reznichenko placed 25th at the 2017 European Championships in Ostrava, Czech Republic, just missing a spot in the final segment.

As a result, Poland assigned him to compete at the 2017 CS Nebelhorn Trophy, the final qualifying opportunity for the 2018 Winter Olympics.