WhatsApp, the ubiquitous instant messaging platform, has revolutionized how we communicate. With over 2 billion active users, it's a testament to the remarkable engineering behind the scenes. In this blog post, we'll explore the architectural principles and system design choices that have enabled WhatsApp to scale to such massive proportions while delivering a seamless user experience. WhatsApp system design revolves around providing users with a reliable, secure, and efficient messaging experience. The architecture of WhatsApp is built upon a distributed network of servers and employs various technologies to ensure seamless communication between users.