High-Energy Physics explores the fundamental laws of the Universe through global experiments such as the LHC at CERN. Confronting experimental data with theoretical predictions lies at the heart of this research, but the calculations required to study New Physics models are complex and computationally demanding. Developing automated codes capable of generating these predictions directly from the Lagrangian of various models is therefore a major challenge to accelerate and systematize the study of scenarios beyond the Standard Model. The proposed internship will allow the candidate to: - Become familiar with these existing codes (such as MARTY and SuperIso) and their functionalities, - Contribute to their development and automation, making the calculations more robust and accessible, - Explore, through concrete applications, different New Physics models and their phenomenological predictions. This project will provide practical experience with computational tools used in theoretical particle physics, as well as an introduction to the systematic study of New Physics effects, combining theory, phenomenology, and scientific programming.