[1][2] Ruban competed at the 2004 Summer Olympics in men's individual archery.

Ruban was also a member of the bronze medal Ukrainian men's archery team at the 2004 Summer Olympics.

This gave him the third seed for the final competition bracket in which he faced Maged Youssef in the first round, beating the Egyptian 111-96.

In the semi-final he and his opponent Bair Badënov both came to 112 points and an extra round was needed.

Together with Markiyan Ivashko and Oleksandr Serdyuk he also took part in the team event.