[2] In the 2017, 2019 and 2021 Afrobasket events, she represented D'Tigress, Africa's highest-ranked side and won three straight championship for them.

In 2017, Kalu signed with the Hungarian club Vasas Akademia for one season (17.0 points, 3.4 rebounds and 3.9 assists).

In 2019, she joined the French side Landerneau BB, averaging 15.7 points, 3.4 rebounds and 3.2 assists in the 2019-2020 season.

[6][7] Kalu played for the Nigerian national team at the 2016 FIBA women's Olympic qualifying tournament.

[12] She competed at 2020 FIBA Olympic qualifying tournament, averaging 16 points, 2.7 rebounds and 4.3 assists per game.

[15] In September 2021, she participated in the Afrobasket tournament emerging champion with Nigeria's D'Tigress averaging 12.4 points, 3 rebounds and 4.6 assists per game.