They achieved a personal best short program score, of 59.76 points, but their ranking (nineteenth) was insufficient to advance to the final segment.

They outscored Annika Hocke / Ruben Blommaert by 5.77 points for the bronze medal at the 2017 CS Warsaw Cup in November.

The following month, the pair won silver behind Aliona Savchenko / Bruno Massot at the German Championships, ranking second in both segments and obtaining 4.33 points more than Hocke/Blommaert.

[5] Due to a back injury sustained by Hase, the pair was unable to accept a spot at the 2018 European Championships, which became available after Savchenko/Massot withdrew.

[9][10] After participating at the 2018 Golden Spin of Zagreb and placing fourth,[11] they won their first national title at the 2019 German Championships.

[12] Hase/Seegert took sixth place at the 2019 European Championships,[13] and at the 2019 Challenge Cup they won gold at their first international competition with a new best total score of 185.38 points.

At their second Grand Prix assignment, the 2019 Rostelecom Cup, Hase/Seegert placed fourth in the short program, narrowly behind the new Russian pair of Stolbova/Novoselov.

[21] In the free skate, Stolbova/Novoselov performed poorly, while Hase/Seegert nearly equaled their personal best in the segment, placing fourth again, but third overall due to their short program lead over the Austrian team Ziegler/Kiefer.

"[22] After winning the German title for the second consecutive year, Hase/Seegert were assigned to the 2020 European Championships, where they placed fifth in the short program with a new personal best, breaking 70 points in that segment for the first time.

"[24] This proved to be their final competition for the season, as they had been assigned to compete at the World Championships in Montreal, but these were cancelled as a result of the coronavirus pandemic.

[27] Hase/Seegert were scheduled to compete in the Grand Prix at the 2020 Internationaux de France, but the event was cancelled due to the pandemic.

[37] They placed fourteenth in the short program after Hase fell on her jump attempt, qualifying for the free skate.

Seegert initially sought a new partner, but in January 2023 he informed the German Ice Skating Union that he had not been able to find a suitable one, and that he would be retiring from competition.

In June 2022, Hase was introduced to Russian pair skater, Nikita Volodin, by Dmitri Savin.

It was subsequently announced that the pair would train in Berlin under coaches, Rico Rex and Knut Schubert, due to Hase being unable to travel to Russia with the country's ongoing political situation resulted from its invasion of Ukraine.

[47][48][49] Hase/Volodin debuted as a team at the 2023 CS Lombardia Trophy, where they won the silver medal behind reigning Italian European champions Conti/Macii, and finishing ahead of domestic rivals Hocke/Kunkel.

"[50] They went on to win a Challenger gold medal on home soil at the 2023 CS Nebelhorn Trophy, after coming back from placing third in the short program.

"[52] They went on to win the 2023 NHK Trophy as well, improving on all their personal bests in the process and qualifying to the Grand Prix Final as the second seed.

Returning to China for the Final, held in Beijing, they performed their first full run-through since the NHK Trophy in training.

Hase/Volodin set a new personal best score to win the short program narrowly over Canadians Stellato-Dudek/Deschamps and Italians Conti/Macii.

Despite Hase making a Salchow error in the free skate, they came third in that segment, and rose to third overall to claim the bronze medal.

"[57] Hase/Volodin started the season by winning gold at the 2024 CS Nebelhorn Trophy, defeating reigning World Champions, Stellato-Dudek/Deschamps, and scoring personal bests in all competition segments.

[59] They went on to compete at the 2024 Trophée Métropole Nice Côte d'Azur, however after completing the short program segment, the senior pairs free skate event was cancelled due to poor weather conditions.

"[59][61] Three weeks later, prior to the pairs short program at the 2024 Cup of China, Hase would suffer with food poisoning.

Despite this, the pair would go on to complete their short program, finishing second in that segment behind Conti/Macii due to Volodin taking an unexpected fall during the step sequence.

[59] Note: The senior pairs free skate at the 2024 Trophée Métropole Nice Côte d'Azur was cancelled on account of inclement weather.