The expansion of mobile cloud computing (MCC) has led to a rapid evolution in how data and services are delivered across geographically dispersed infrastructures. While MCC enables flexibility, scalability, and ubiquitous access, it presents critical security and performance challenges. This paper proposes a comprehensive architecture that leverages Software-Defined Networking (SDN), Network Function Virtualization (NFV), and Cloud Access Security Broker (CASB) to enhance the resilience, scalability, and manageability of MCC systems. We introduce a layered architecture where SDN controls the network plane, NFV deploys dynamic security functions, and CASB enforces data governance in cloud services. Through extensive experimentation using Mininet and traffic simulation tools, we evaluate the system’s latency, throughput, scalability, and security performance under various traffic conditions. Results demonstrate that the proposed solution achieves latency overhead under 5ms, successfully mitigates more than 90% of DDoS attacks, and scales efficiently to handle up to 10,000 firewall rules with less than 10% performance degradation. This integrated solution promises to strengthen MCC deployments, particularly in critical sectors like finance, healthcare, and smart cities.