The DESY group "Information Technology" (IT) is participating in a variety of high profile national and European projects, evaluating new and innovative IT technologies. We are currently participating in the build-up of the German EOSC node together with 10 other highly regarded institutions from the German research landscape and within the National Research lnfrastructure (NFDI). This effort requires a high degree of coordination between more than 300 German universities and research centers as weil as national and European infrastructures. To realize this ambitious objective, we're seeking a scientist who possesses expertise in web technologies, especially in federated Authentication and Authorisation infrastructure technologies. Additionally, the ideal candidate should be driven to contribute to the development of these technologies within the evolving EOSC framework.