References

• The best way to prepare for system design interviews — the practice-loop method (struggle first, read the answer key last).
• Hello Interview — Delivery Framework — the in-room structure these notes follow.
• System Design in a Hurry (Hello Interview) — condensed, interview-focused: core concepts, key technologies, numbers to know.
• System Design Interview – An Insider’s Guide (Alex Xu) — the standard primer; broad coverage of the building blocks.
• Jordan Has No Life (YouTube) — deep, practical walkthroughs.
• Hello Interview — Common Problems — worked question breakdowns with answer keys (e.g. Bitly, Ticketmaster, WhatsApp).
• Hello Interview — Real Interview Questions — actual questions from recent interviews, reported by other users.
• Hello Interview — Staff-Level System Design — what raises the bar from senior to staff: leading deep dives, proactive trade-offs.
• Excalidraw — virtual whiteboard for timed practice.