Main responsibilities: Provision/further development of applications on a native Android stack, in particular Analysing and designing applications Development of proposals for interface design Implementation of the application (presentation, application and data management) Implementation of general and technical services (web services, data distribution), in particular also the connection to third-party products, use of interfaces to the operating system and the control of WLAN and Bluetooth connections Carrying out application tests (module and integration tests) Carrying out prototyping with future users Qualifications: Completed studies in the field of computer science or comparable training with professional experience Proven professional experience, career starters also conceivable Knowledge of OOA/OOD based on UML Knowledge of OO programming (Java, Kotlin) Knowledge of relational databases Knowledge of the software development process Very good knowledge of English, German an advantage Experience and other skills desirable: ~ Team and project management.