My research is focused on electroweak nuclear physics and its interface with particle and astrophysics. The main current motivation for my work are long-baseline neutrino oscillation experiments. Their success depends strongly on precise models for the neutrino-nucleus interaction. I approached the challenging task of building these models during my Ph.D. at University of Valencia. At that time I acquired expertise across a broad range of topics at the intersection of nuclear and hadron physics, building on a strong research profile of the Valencia group, being world-leading experts in hadron physics. During my postdoctoral appointment at Johannes Gutenberg University in Mainz, I have acquired expertise in many-body nuclear theory and launched a pro- gram which employs ab initio nuclear techniques to calculate the neutrino-nucleus cross-sections from first principles. In the last 4 years, I pushed the frontier of these ab initio methods towards energies and nuclei important for neutrino experiments.