HEAppE Middleware is IT4Innovations’ in-house implementation of HPC-as-a-Service concept. It is being continuously developed for a more than a 10 years taking into account the user requirements and security policies and constraints of different HPC or Data centres while supporting a number of widely used HPC workload managers. Via simple and easy-to-use REST API the end-users can manage the complete HPC job life cycle, file transfers, and HEAppE-specific functionality. HEAppE provides a user-friendly, secure, and cost-effective solution for the end-users or third-party applications on how to remotely access supercomputing resources without the HPC-specific know-how. This poster was presented at the conference EURO-PAR and details published as a paper in the conference proceedings.