During the 2014 track season, Alemitu set world junior leading times over 3000 m, two miles and 5000 m; her two miles time (9:20.81 at the British Grand Prix in Birmingham) was a new world junior best. She won the 5000 m at the 2014 World Junior Championships in Eugene, outkicking her Ethiopian teammate Alemitu Hawi in 15:10.08 and leaving Tirop (who was slightly injured) more than half a minute behind. At the 2015 World Cross Country Championships in Guiyang Alemitu ran in the senior race for the first time, placing fourth as Tirop won. Alemitu debuted in the 10 000 metres at the 2015 Ethiopian World Championships Trials in Hengelo; she placed second behind Gelete Burka in 30:50.83, qualifying for the World Championships in Beijing.