In the current environment dominated by technology-driven work trends, many organizations are confronted with the need to promptly update old and redundant legacy systems. This paper explores the challenging domain of transitioning a large-scale monolithic system toward a microservices architecture. Such systems are often difficult to scale beyond a certain point, especially given the growing demand, leading to significant technical debt. However, this challenge can be mitigated by adopting a microservices approach. We propose a clear and methodical characterization of appropriate migration techniques designed to minimize interruptions during the transition process. The paper articulates these techniques thoroughly and discusses key issues such as securing communications between the old and new architectures, simultaneously running Multi-Page Applications (MPAs) and Single-Page Applications (SPAs), synchronizing and integrating APIs, and ensuring data integrity. Moreover, we demonstrate how these strategies can be implemented effectively by incorporating new components to facilitate API transformations and utilizing distributed caching systems to maintain data consistency. This paper also advances the discourse on the microservices adoption process and its desirable outcome: creating software systems that are more agile, scalable, and easier to develop and maintain.