As part of the merger between E.ON and innogy, a new, harmonized system landscape will be provided in the SPACE project. Within the "Front Office" sub-project, the future customer service platform (CRM, input channels, portal, output management) for the customer service unit - E.ON Grid Solutions GMBH of the German E.ON regional supply company will be set up. The clear project goal of the assignment is the standardization of operating processes. The CIC customer portal offers network customers (SLP/RLM) basic functions that enable digital handling of service processes in the context of the role of network operator. In addition, the customer portal is a digital platform that offers various processes as self-service. Description of services: - The external contractor will take on the following tasks within the scope of the project, which will be carried out independently: - Further development of the range of functions of the middleware (Java) in accordance with technical specifications from User Stories - Conception of new interfaces and their connection via the provided integration platform (REST) - Analysis of malfunctions in the application environment and implementation of appropriate remedial measures - Documentation of suggestions for improving the system in the form of user stories as well as the cost-effective operation of the system landscape on one's own initiative - Adaptation of the operating concept based on E.ON's specifications based on adjustments due to the above-mentioned activities All necessary information and documents will be provided in advance by E.ON.