At the 2010 World Junior Championships in Moncton (Canada), Jamile Samuel finished third in both the 100 meter and 200 meter sprints. With her teammates Dafne Schippers, Loreanne Kuhurima and Eva Lubbers she won a bronze in the 4x100 meters relay. One year later, at the 2011 European Athletics Junior Championships in Tallinn, Samuel finished behind British 100 and 200 meter sprints winner Jodie Williams, winning the silver medal in both cases.