Determined to work in fashion from childhood, Muaddi studied at the European Institute of Design in Milan, then learned the trade in Italy's historic shoemaking district of Riviera del Brenta. After co-founding the label Oscar Tiye in 2013 and working with Alexandre Vauthier in Paris, she struck out on her own.
Her sculptural heels have been worn by Bella and Gigi Hadid, Kim Kardashian, Kylie Jenner and Rihanna — who commissioned her to design footwear for Fenty in 2020. Footwear News named her Designer of the Year in 2019, and in 2023 she received the Neiman Marcus Award for Innovation.