Mukhamadullin represented Russia at the 2018 World U-17 Hockey Challenge, where he won a gold medal. He represented Russia at the 2019 Hlinka Gretzky Cup, where he recorded one assist in five games and won a gold medal. He again represented Russia at the 2019 IIHF World U18 Championships, where he won a silver medal. Mukhamadullin scored the game-winning goal in double-overtime at the 2019 World Junior A Challenge, helping Russia win their first gold medal in the World Junior A Challenge tournament.