One senior postdoc position is available in the theoretical quantum optics group at the Niels Bohr Institute, University of Copenhagen. The position will be part of the quantum internet alliance which is a European project aiming at building large-scale quantum networks. The postdoc will participate in designing and modelling the prototype quantum internet that is scheduled to be built at the end of the project. Additionally, the successful candidate may work on other activities within the area of theoretical quantum optics, quantum networks and quantum information.