The Theory of Nanophotonics Group at the Donostia International Physics Center (DIPC) in San Sebastián (Spain) offers a fully funded PhD position to explore how light-matter interactions at the nanoscale can push the boundaries of nanophotonic-based quantum technologies. This position offers a unique opportunity to dive deep into the theory behind quantum nanophotonic platforms, working in a world-class research environment, and developing realistic models that connect directly with experimental efforts. Full call: https://cfm.ehu.es/nanophotonics/wp-content/uploads/2025/09/Phd_2025_2026.pdf