Shleikher began practicing diving at the school of Olympic reserve in Penza, where he became a multiple medalist and champion of Russian Junior Championships.

He competed at the 2012 World Junior Championships finishing 5th in 10m platform and 7th in 3m springboard.

He won a silver and a bronze at the 2014 European Junior Diving Championships.

[citation needed] Shleikher relocated to Kazan and took up residency in the Tatarstan.

[1] In 2015, Shleikher competed at the inaugural 2015 European Games, where he won gold in 1m springboard but took only 2nd place in 10m platform behind Britain's Matty Lee.