Numerous services with varied Quality of Service (QoS) values that are functionally comparable are offered in the software as a Service (SaaS) cloud marketplace. The engineers are responsible for selecting the appropriate services and optimizing the service composition plans for each user group in order to handle the multi-dimensional QoS and functional needs of end users. The numerous strategies sometimes overlook the necessity of providing alternative execution plans, each of which offers a tailored plan for a certain customer with its functionality, QoS and cost requirements. This results in a dynamic issue that is NP-hard. We provide a unique multi-client middleware for dynamic service construction in the SaaS cloud that incorporates additional non-functional needs. The proposed middleware aims to empower clients to create innovative and tailored solutions by leveraging the vast array of services available in SaaS cloud environment efforts and accelerates time-to-market for new applications.