There are customer-facing applications such as B2C e-commerce web applications and corporate portals. These are being designed and developed by using multiple services (purpose-specific and agnostic). There are proven mechanisms such as business capability, technology superiority, cross-cutting concerns, domain-centricity, quality of service (QoS), and so on to partition the original application into many microservices or to build microservices from the ground up. One aspect here is some UI screens/pages services have to display data from multiple services. UI designers sketch the overall look whereas web application developers focus on different HTML fragments that implement the particular region of the web page. The UI team is responsible for developing the page templates that build pages by performing server-side aggregation of the service-specific HTML fragments.