Nijimbere was born on 26 December 1996 in Mutanga-Nord, a suburb of Bujumbura, the largest city in the country.
[1] He grew up attending his father's Sunday league basketball games with his three brothers, all of whom ended up playing the sport.
[2] Starting his career for New Star in 2013, he became the youngest player to play at Burundi's highest level at the age of 16.
He was named MVP of the 2019 Genocide Memorial Tournament and won the three-point contest in that year's All-Star game.
[2][3] In November 2021, Nijimbere returned to New Star to play in the second round of the 2022 BAL Qualifying Tournaments.