Sara el-Hachimi gained her first international experience in 2017 at the Junior African Championships in Tlemcen , where she won the gold medal in the 400-meter hurdles in 60.62 s before she took the first at the U18 World Championships in Nairobi with 60.79 s Round eliminated. Two years later she won the silver medal in the 400-meter run at the Junior African Championships in Abidjan in 55.02 s and finished fifth over the hurdles in 61.62 s. In August she took part in the Africa Games in Rabat and was eliminated there with 62.53 seconds.
In 2018 el-Hachimi became the Moroccan champion in the 200 and 400 meter run.