How to Structure a System Design Interview in 45 Minutes
Most candidates jump to drawing boxes on a whiteboard. Here’s the exact structure, order, and time allocation that turns a chaotic 45 …
Read MoreBack of Envelope Calculations in System Design
Most candidates either skip estimation entirely or spend five minutes doing exact math. Here’s how to do quick, high-signal capacity …
Read MoreHow to List Non-Functional Requirements in System Design
Saying ’the system should be scalable and highly available’ is not an NFR. Here’s how senior engineers define NFRs that actually drive …
Read MoreHow to List Functional Requirements in System Design
Most candidates list features. Senior engineers define the system’s contract. Here’s a framework to get FRs right - with examples, …
Read MoreSQL vs NoSQL: A Practical Guide to Picking the Right Database
A deep, practical guide to SQL vs NoSQL databases. Not textbook definitions - real trade-offs, real examples, and a decision checklist that …
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