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Complex application deployment and management over multiple heterogeneous PaaS platform is one of the key problems that have emerged with the cloud technology revolution. Presently, vendor lock-in has become a major PaaS technology challenge. Multi-Cloud PaaS Architecture (MCPA) has been recently proposed research project, intended to resolve complexity and interoperability challenges. MCPA offers flexible tools and services for seamless adaptive multi-cloud management of complex application modules over the heterogeneous PaaS cloud. In this research study, the authors have outlined motivation and objectives of the MCPA projects. MCPA positioned with respect to related cloud initiatives and its initial design and infrastructure has also been discussed. The Initial results show that the use of MCPA in PaaS cloud can improve portability and mitigate lock-in problem.