https://yutongjin.com/tags/sd/Recent content in Sd on Yutong JinHugoen-usWed, 08 Apr 2026 00:00:00 +0000https://yutongjin.com/posts/sd_learning_48/Wed, 08 Apr 2026 00:00:00 +0000https://yutongjin.com/posts/sd_learning_48/<h1 id="10-system-design-tips-senior-level">10 System Design Tips (Senior-Level)</h1> <p>April 8, 2026<br> Yutong Jin</p> <hr> <h2 id="-system-design-key-principles">🧠 System Design Key Principles</h2> <h3 id="1-start-with-functional-requirements">1. Start with Functional Requirements</h3> <p>Clearly define what the system needs to do:</p> <ul> <li>Core APIs (read/write flows)</li> <li>User interactions</li> <li>Edge cases</li> </ul> <p>💡 Tip: Do NOT spend too long here — 2–3 minutes is enough in interviews.</p> <hr> <h3 id="2-identify-the-core-bottleneck-early">2. Identify the Core Bottleneck Early</h3> <p>Before designing, ask:</p> <ul> <li>What is the expected QPS?</li> <li>Where will the system break first?</li> </ul> <p>Common bottlenecks:</p>