Why Design for Scale?

Or, "can't we just use more compute?" Preface Hi, I’m Rasheed Bustamam. I’ve been a full-stack engineer since 2015. I’ve worked with and consulted for startups, served as a founding engineer, and been part of multiple successful exits. In many circles, that’s considered startup gold. But here’s the gap: while I’ve built fast, shipped quickly, and prototyped aggressively, I haven’t had deep exposure to scale. Not real scale. What does “scale” even mean? Is it user volume? Geographic distribution? Latency under load? Operational complexity? Different companies optimize for different things. And I realized that while I understood how to build features, I didn’t deeply understand how to design systems that hold up under pressure. The Turning Point Five years ago, I interviewed at Google and was asked to “design the Google search bar.” At the time, my mental model was: “Isn’t it just a text input that calls GET /api/search ?” Needless to say, I didn’t get the job. But five years later, I sh