This project explores a new experimental platform combining single-atom control with cavity-mediated long-range interactions. At LKB, we have recently demonstrated arrays of individually trapped atoms strongly coupled to a high-finesse optical microcavity, with single-atom-resolved detection. The experiment now opens exciting perspectives for quantum simulation of spin transport under tunable disorder and dissipation, as well as for quantum-enhanced metrology. Depending on the progress of the experiment, the internship will focus on experimental developments such as optical beam shaping or laser stabilization. The student will gain hands-on experience in optics, lasers, cold atoms and cavity QED, with the possibility of continuing toward a PhD exploring these new research directions.