SQL vs NoSQL: How to Choose Without Hedging
“It depends on the use case.”
System Design Interview Roadmap
System Design Interview Roadmap - Step by step process that will make you comfortable, familiar & then expert. Preparing for a system design interview, probably at a FAANG-tier company, probably at L4–L6. That's exactly who this newsletter.
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Latest posts
Building an AI Agent Framework: Memory, Tools, and Planning Modules
The Dispatch Problem
Design Airbnb Booking System — Walkthrough
The probe
The Time Management Problem
The most common reason technically strong candidates get a “Hire” instead of “Strong Hire” is not technical depth.
Semantic Search vs. Keyword Search: System Design Trade-offs
Introduction
Design Instagram Feed Ranking — Walkthrough
The probe
Three Gaps I See in Almost Every Cohort Assignment
After reading hundreds of system design assignments from cohort members, three gaps show up so consistently that I now watch for them specifically in every submission.
GPU Scheduling & Utilization: How Kubernetes Manages AI Hardware Resources
Introduction
Design Slack — Walkthrough
The probe
Why Strong Engineers Fail the Design Round
The system design interview round has a failure rate that surprises most engineers when they first encounter it.
Fine-Tuning Pipelines: Designing the Architecture for Custom Model Training
Introduction
Design a Distributed Cache (Redis-style) — The Senior+ Walkthrough
This question is asked as a standalone (”design a distributed cache”) and as the deep-dive in almost every other system design question (”you mentioned adding a cache — walk me through how you’d build that”).