A 16-year-old Diribe Welteji won the gold medal for the 800 m event at the 2018 World Under-20 Championships in Tampere, where she also competed in the women's 4 × 400 m relay without reaching the final, but achieving an Ethiopian junior record.

[1] The 19-year-old competed without success in the women's 1500 m at the delayed 2020 Tokyo Olympics in August 2021, but the same month took silver in this event at the World U20 Championships held in Nairobi.

[2][1] Welteji placed fourth in the 800 m at the 2022 World Athletics Championships in Eugene, Oregon in July with a time of 1:57.02.

[3] In August, she won her first Diamond League meeting with a 1500 m victory, beating her esteemed compatriot Gudaf Tsegay at the Kamila Skolimowska Memorial in Chorzów, Poland.

[5] In December 2024, it was announced that she had signed up for the inaugural season of the Michael Johnson founded Grand Slam Track.Track]].