Leslie received her engineering degree in chemistry from the École Supérieure de Chimie Physique Électronique de Lyon (CPE Lyon) in 2018, specializing in biology as part of a one-year exchange program at the École Polytechnique Fédérale de Lausanne (EPFL). From 2019 to 2023, she pursued a Ph.D. at the Gustave Roussy cancer treatment and research center, followed by a one-year postdoctoral position in 2024. During this time, she investigated the use of ultrashort-duration pulsed electric fields with the aim to perform efficient contactless electroporation. She also worked on using classical microsecond pulsed electric fields to control calcium signaling in stem cells in order to influence cell fate. From March to June of 2025, she was on a visiting position at the Royal Melbourne Institute of Technology (RMIT), supported by a Short-Term Mission Grant from the BioEM Society, to study the mechanisms of cell permeabilization induced by 18 GHz and Synchrotron-sourced terahertz (THz) radiations. From September 2025, she joined the Biomedical Electronics Research Group (BERG) at Universitat Pompeu Fabra (UPF) as a postdoctoral fellow to study electroporation at low field amplitudes, with a particular focus on induced calcium mobilizations and the potential of "hacking" calcium signaling in cells with these electric fields.