How I Ensure My Application Scales (opens in new tab)

During a job interview I was explaining my day-to-day responsibilities and how I ensure quality on my projects, then I mentioned - “I check that my application scales” - The interviewer then asked - “How do you make sure your application scales?” - I froze, I didn’t have a structured answer and I got blocked because I was not prepared to answer that question. So this post is a retrospective about that experience and outlines a framework for thinking about scalability when working on new featu...