In 2017, Jeannelly took her first steps into the fashion industry by becoming a fashion dresser for several shows during Fashion Week, while continuing her fashion studies and simultaneously working in retail for mid-range, high-end, and luxury brands.

In 2020, she graduated as a fashion designer and co-founded the fashion media and magazine JusteUnDétail.

The year 2023 was a breakthrough for her : she was responsible for styling the first runway show of the brand Edsar and also worked as an assistant stylist for the lookbook. Since then, she has showcased her talent as a fashion stylist, art director, editor-in-chief, and personal shopper.