Despite having a full course load in university, Josephine's passion for the sport has motivated her to continue balancing her school work and training.

[9][10][11] Wu was a gold medalist in the mixed doubles event at the 2019 Lima Pan American Games.

[4] In 2021, Wu defend her mixed doubles title at the Pan Am Championships with partner Joshua Hurlburt-Yu, when the duo beating Christopher Martínez and Marian Paiz of Guatemala in the final in straight games.

[12] In June, Wu was named to Canada's Olympic team,[13] competing in the mixed doubles badminton event with Hurlburt-Yu, but they were eliminated in the group stage.

[17] As the first seeded at the Pan Am Championships both in the mixed and women's doubles,[18] she had to settle for the bronze medals in both events after being defeated by the American pairs.