I work on observational cosmology, with special focus on gravitational lensing in all regimes: strong, weak and micro. In particular, I contributed to develop the field of time delay cosmography, currently organized around the TDCOSMO collaboration. I am deeply involved in Rubin-LSST and in the ESA-NASA Euclid space mission, where I co-lead the strong lensing Science Working Group. A significant part of my research is also in pure signal processing, using wavelets and deep learning to address astrophysical projects.