A comprehensive upgrade to Patungan's customer relationship management platform, transforming their legacy system into a modern, feature-rich solution that addresses complex enterprise requirements while maintaining an intuitive user experience. This second-generation CRM implements a microservices architecture built on the MERN stack (MongoDB, Express, React, Node.js), enabling seamless scalability and future extensibility. The system features real-time data synchronization across departments, intelligent workflow automation, and advanced data visualization dashboards that provide actionable insights for decision-makers. A significant technical achievement was the development of a sophisticated data migration pipeline that allowed for zero-downtime transition from the legacy system while maintaining data integrity and historical records. Post-implementation metrics showed a 42% increase in team productivity and a 38% reduction in customer response times, directly contributing to improved customer satisfaction scores and higher retention rates.