Knowledge Hub
Everything I've learned about system design, coding interviews, and software engineering - organized for you.
Browse by Category
System Designs
HLD, LLD, architecture patterns, and real-world system breakdowns
Cheatsheets & Resources
Quick reference guides, templates, and downloadable PDFs
Coding Problems
LeetCode solutions, patterns, and interview preparation tips
Videos
Tutorials, walkthroughs, and conference talks
Interview Experiences
Real interview stories, preparation tips, and lessons learned
Latest System Designs
View AllDesigning a Rate Limiter
A comprehensive guide to designing a rate limiter system - covering Token Bucket, Sliding Window, and distributed implementations.
Designing a URL Shortener (like bit.ly)
System design for a URL shortening service - handling billions of URLs, high availability, and analytics.
Latest Coding Content
View AllTwo Sum - Multiple Approaches Explained
A deep dive into the classic Two Sum problem with brute force, hash map, and two-pointer solutions.
My 3-Month Interview Preparation Journey
How I prepared for Staff Engineer interviews at top tech companies - resources, schedule, and lessons learned.
Cheatsheets & Resources
View AllDocker Commands Cheatsheet
Essential Docker commands for everyday use - containers, images, volumes, networks, and Docker Compose.
Git Commands Cheatsheet
Essential Git commands for everyday use - squash commits, amend, cherry-pick, and more advanced workflows.
Kubernetes Commands Cheatsheet
Essential kubectl commands for managing pods, deployments, services, secrets, and more.
Interview Experiences
View AllRippling - Senior Software Engineer (Benefits)
Rippling Senior Software Engineer interview with an intensive 60-minute algorithm programming coding test focused on system design problems.
Coupang - Senior Software Engineer Interview
Coupang Senior Software Engineer interview with 3 comprehensive rounds covering DSA, High-Level Design, and Low-Level Design.
Get More Content
Subscribe to get new resources, system designs, and coding tips delivered to your inbox.
Subscribe to Newsletter