[6] Coached by Nikolai Velikov and Ludmila Velikova, the pair won the junior title at the 2017 Golden Spin of Zagreb, their first international event.

They were part of a Russian sweep of the pairs' podium, along with their training partners Polina Kostiukovich / Dmitrii Ialin (silver) and Daria Pavliuchenko / Denis Khodykin (gold).

They were ranked first in both the short program and the free skate and won the gold medal by a margin of more than 11 points over the silver medalists, their teammates Apollinariia Panfilova / Dmitry Rylov.

Mishina/Galliamov made their international senior debut at the 2018 CS Alpen Trophy, where they won the gold medal with a personal best score of 192.75 points.

[6] At the 2019 Russian Championships, they competed as seniors domestically, placing fourth in the short program with upgraded jump and throw content.

[14] Making their senior Grand Prix debut at the 2019 Internationaux de France, Mishina/Galliamov were second in the short program behind Daria Pavliuchenko / Denis Khodykin.

[18] Competing at the Final, Mishina/Galliamov were fourth in the short program, skating cleanly but for their side-by-side spins not receiving a level due to errors.

[20] Mishina/Galliamov ran into trouble in the short program at the 2020 Russian Championships, with Mishina falling on their throw triple flip, stumbling in the step sequence, and exiting the pair spin too early.

"[22] In the spring of 2020, Mishina/Galliamov moved to train under Tamara Moskvina, the coach of numerous Olympic pairs champions, and choreographer Alexander Stepin.

[25] Subsequently, they were able to compete in the fourth stage of the Russian Cup in Kazan, winning the gold medal over former national champions Tarasova/Morozov and their fellow Moskvina students Boikova/Kozlovskii.

[28] In the free skate, Mishina singled a planned triple Salchow, resulting in a second-place finish in that segment and the silver medal overall, behind Boikova/Kozlovskii.

[29] At the 2021 Russian Championships, Mishina/Galliamov entered with expectations of vying for the top of the podium but encountered problems in the short program when Galliamov skated through his attempt at a side-by-side jump.

Coach Moskvina designed their new free program to the music of Georgi Sviridov to express how "the youth is striving for something new and different than the past generation.

[43] The results qualified them for the Grand Prix Final, to be held in Osaka, but it was subsequently cancelled due to restrictions prompted by the Omicron variant.

[44] At the 2022 Russian Championships, Mishina/Galliamov placed first in both segments of the competition to take the gold medal, 3.87 points ahead of silver medalists and training partner rivals Boikova/Kozlovskii.

"[45] Making their European Championship debut at the 2022 edition in Tallinn, Mishina/Galliamov won the short program, prevailing over a clean skate by Tarasova/Morozov by 0.78 points, and breaking their training partners Boikova/Kozlovskii's world record in the process.

[48] They also performed in the free skate segment, winning it despite a double-fall on their final lift, together with the rest of Team Russia, won the gold medal.

"[50][51] In early March 2022, the ISU banned all figure skaters and officials from Russia and Belarus from attending the World Championships due to the Russian invasion of Ukraine; therefore Mishina/Galliamov were not allowed to participate and defend their title.