In this blog post, Coupang Engineering discusses their backend strategy to handle massive traffic and serve data from their microservices to customers at high availability, high throughput, and low latency. The post outlines the challenges of managing complex data systems for 18 million customers and details the core serving layer, which unifies business logic code and serves data to customer pages. The article also covers strategies for high availability, caching, and real-time data streaming. Overall, the goal of their data serving platform is to ensure high availability, handle high read traffic, and unify business logic code to reduce complexity.