Purpose: This paper aims to explain the development of an online training curriculum to enable students to acquire the transversal competences needed to work on smart cities projects. In this curriculum, a modern approach to the teaching-learning process was applied, suitable for the interdisciplinary and multinational learning challenges that smart cities impose, but within the framework of a university-industry European partnership. Design/methodology/approach: To develop the curriculum, the competences needed for smart cities, common to all disciplines and fields, had to be researched. In addition, real smart cities projects also had to be selected for work following a project-based learning methodology. For both, this study applied the Delphi method, selecting the most relevant ones based on the data obtained by performing a multi-criteria decision analysis. Findings: The procedure followed for the identification of transversal competences in a field, the design of an innovative online training program and the results of the first edition of the program are discussed. Research limitations/implications: The processes that were developed, both to detect the most relevant transversal competences and to design the online training program, could be extrapolated to other areas. Moreover, it is very likely that the competences detected in this work could also be extrapolated, for the most part, to interdisciplinary teams. Originality/value: To date, there is no European initiative addressing the challenges of smart cities that requires a major adjustment in higher education, in the relationship between universities and all the mechanisms of lifelong learning with the industry related to smart cities. This work is a pioneer in this regard.