The advent of multiple asynchronous and event-driven technologies has influenced a paradigm shift in the traditional three-tier web architecture infusing changes in each layer of the architecture. Frontend web development has been supported by React JS, Micro Frontend jQuery, etc. The unique requirements to differentiate the user experience in the web application require significant architectural shifts in the controller, business, and backend layer and most importantly require an event-driven and asynchronous approach. In modern global user experience applications typically used by front desk or customer online applications, these architectural shifts are ubiquitous. This article provides strategic guidance for architectural decisions on choosing AWS services and further finetuning the performance of such responsive and performant web applications based on some real and practical production scale solution developments and deployment experience.