Systems design interviews reward a way of thinking, not a memorised answer. This course builds that framework from the ground up (scaling, storage, messaging and trade-offs) then applies it to five full case studies you could be asked to design tomorrow. By the end you'll be able to walk into a whiteboard interview and structure an answer with confidence.

• Break down any system design prompt into a repeatable framework
• Reason about scaling, latency and availability trade-offs out loud
• Design real systems: URL shorteners, feeds, chat, dispatch, schedulers

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• 00:00Welcome back. In this lesson we'll cover reading and estimating back-of-the-envelope numbers.
• 05:20Let's start by walking through the core idea, step by step.
• 10:40Now let's look at a practical example you can apply right away.

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