My main scientific activity is phenomenology of weak and strong interactions in the Standard Model (SM) and beyond. I have mainly explored the weak decays of hadrons with a goal of selecting observables that allow a high precision theoretical predictions that could be experimentally tested in order to discover the effects of New Physics (NP) (such as extra sources of CP violation with respect to the SM). High precision tests of loop induced processes in the SM (such as $(g-2)_mu$, $bto sell^+ell^-$ modes, Kaon decays and many others) offer a window to discovering the presence of new particles propagating in the loops, in a way similar to how charm and/or top quarks have been discovered. Moreover, from 2015, I have extended my interests to the phenomenology of axion physics and more general dark sectors, which can play an important role in the near future. I have made important theoretical studies to constrain the coupling of axion with photons, nucleons and electrons in view of new experiments, like IAXO. This research has been published in several PRLs and 2/3 of them have been awarded as editor suggestions. Axions by itself are a very good candidate as dark matter. Recently, I have also enriched my expertise in the study of NP models with stable weak interacting massive particles (WIMPS) as dark matter candidates. Here, I have linked dark sectors to flavor physics, namely dark particles can enter a loop of flavor observable. My main field of expertise is the treatment of strong interaction effects in hadron decays (strong and/or weak), by using both analytic methods (such as effective theories of HQET and ChPT), and numerical simulations related to the formulation of QCD on the lattice. In addition to QCD, I also extended my expertise to the phenomenology of NP models. Recently, I have studied NP models based on vector-like fermions and leptoquarks for $bto sell^+ell^-$ processes which exhibits at LHCb several discrepancies with respect to the SM. I have also worked on projects of large scale QCD simulations, which includes the use of large computing resources in Europe, as Mare Nostrum in Barcelona. Keywords: Effective Theories in the SM and beyond, Flavor Physics, Lattice QCD, $B$ and Kaon Physics, Axion, Dark Matter.