Introduction Picture this: You're sitting in a tech interview room, and the interviewer asks, "How would you design Instagram?" Your palms might get sweaty because this isn't just about coding—it's…
Introduction Imagine sitting across from your interviewer who casually says, "Let's design a social media platform where users can post content and follow each other." This seemingly simple requirement opens…
Introduction Picture this: You're sitting in a tech interview, and the interviewer leans forward with that familiar glint in their eye. "Let's design an online education platform," they say. "Something…
You're building a food delivery app like DoorDash. A customer places an order, which triggers a cascade of events: charge their card, notify the restaurant, assign a driver, send push…
Picture this: You're running a successful e-commerce platform. What started as a few hundred orders per day has exploded to millions. Your single database server, once handling queries with ease,…
Picture this: You're in a system design interview, and the interviewer asks, "How would you design an authorization system for a platform like Discord that needs to check if millions…
It's 2 AM, and I'm debugging what should have been a simple feature. My coffee has gone cold, my eyes are burning, and I'm staring at a network tab that…
If you've ever found yourself staring at a massive switch statement or a series of if-else chains that seems to grow longer every time a new requirement comes in, you're…
Introduction In distributed systems, particularly in database design and data storage systems, engineers often face challenging trade-offs. The RUM Conjecture, introduced by Athanassoulis et al. in 2016, provides a framework…
Introduction Monotonic reads is a crucial consistency model in distributed systems that every senior engineer should thoroughly understand, especially when preparing for technical interviews at leading tech companies. This concept…