DescriptionHPC-as-a-Service is a well-known term in the area of high performance computing. It enables users to access an HPC infrastructure without a need to buy and manage their own infrastructure. Through this service, academia and industry can take advantage of the technology without an upfront investment in the hardware. This approach further lowers the entry barrier for users who are interested in utilizing massive parallel computers but often do not have the necessary level of expertise in the area of parallel computing. To provide this simple and intuitive access to the supercomputing infrastructure, an in-house application framework called HEAppE has been developed. HEAppE's universally designed software architecture enables unified access to different HPC systems through a simple object-oriented API. Thus providing HPC capabilities to the users but without the necessity to manage the running jobs from the command-line interface of the HPC scheduler directly on the cluster.