In 2016, Busse won silver in all-around at the 2016 Russian Junior Nationals behind Sergei Naidin, he also took third in team event,[1] and in the apparatus finals; he won gold in horizontal bar and parallel bars, second in vault and rings, third in pommel horse and 7th in floor exercise.

[2] In 2017 on July 23–30, Busse competed at the 2017 European Youth Olympic Festival in Győr, Hungary were team Russia won gold (together with Sergei Naidin and Aleksandr Kartsev).

He took silver medal in the all-around and qualified to four apparatus finals finishing second in floor exercise and rings, 8th in pommel horse and 6th in horizontal bar.

[3] In 2018, Busse won the qualifying competition in artistic gymnastics ahead of teammate Sergei Naidin held in Baku, Azerbaijan; securing Russia a top quota for the 2018 Summer Youth Olympics.

[4] On July 4–7, at the 2018 Russian Junior National Championships, Busse won silver in all-around behind Sergei Naidin,[5] in the event finals: he won gold in horizontal bars, silver in floor, bronze medals in vault and rings.