Oljunin drove his first World Cup race in September 2009 in Chapelco , which he finished in 39th place in snowboard cross. At the 2010 Snowboard Junior World Championships in Cardrona , he won gold in snowboard cross. At the Snowboard World Championships 2011 in La Molina he came in 34th place. After a World Cup placement in midfield, he achieved a top ten result for the first time in February 2011 in Stoneham with sixth place. In the following season he took his first podium with second place at the same competition site. At the 2013 Snowboard World Championships in Stoneham , he came 17th. After a weak start to the 2013/14 season , he finished fifth in the World Cup race in Vallnord-Arcalís . In his first Olympic participation in Sochi in 2014 , he won silver in snowboard cross. At the last World Cup race of the season in La Molina, he finished second. He finished the season in ninth place in the snowboard cross classification. At the 2015 Snowboard World Championships on Kreischberg , he came in 18th. He won gold at the 2015 Winter Universiade in Sierra Nevada . In March 2015 he finished second in Veysonnaz and finished the season in third place in the Snowboard Cross World Cup. In the 2015/16 season he finished in the top ten four times in the World Cup. He took third and second place once. At the World Cup in Feldberg he won his first World Cup and at the end of the season he finished fourth in the Snowboard Cross World Cup. The following year he finished 17th at the 2017 Snowboard World Championships in Sierra Nevada .