The CoDeF project is an EU Marie Sklodowska-Curie PhD training network focused on the topic of consumer energy demand flexibility. It aims to integrate knowledge of engineering (e.g., mechanical and electrical engineering) and social sciences (economics, sociology, and anthropology) in a doctoral training programme across 10 European research institutions. The CoDeF consortium brings together a multidisciplinary research team from across Europe to train experts in consumer energy flexibility and develop key skills to deliver a just and sustainable energy transition. Consumer energy flexibility is being rapidly acknowledged as a crucial tool as Europe undergoes the energy transition to climate neutrality and energy security. Find more about CoDeF on the Project page.