⏱ 10 min read System Design Interview: Design a Distributed File System (HDFS/GFS) Distributed file systems are foundational infrastructure, powering big data processing, cloud […] Read article

⏱ 6 min read Low-Level Design: Vending Machine (OOP Design Interview) The vending machine is a classic low-level design problem that tests State Pattern, Read article

⏱ 8 min read System Design Interview: Design an API Rate Limiter (Deep Dive) API rate limiting is a fundamental system design topic — Read article

⏱ 9 min read System Design Interview: Design a Payment System (Stripe/PayPal) Payment system design is one of the most important system design interviews, Read article

⏱ 7 min read System Design Interview: Design Google Maps / Navigation System Designing a mapping and navigation system like Google Maps is a Read article

⏱ 6 min read Elevator System Low-Level Design Designing an elevator system is a classic low-level design (LLD) interview question asked at companies like Read article

⏱ 4 min read Low-Level Design: Design a Parking Lot System Parking lot is a classic Low-Level Design (LLD) / Object-Oriented Design interview question Read article

⏱ 3 min read System Design Interview: How DNS Works and How to Design It Understanding DNS (Domain Name System) is fundamental to backend Read article

⏱ 6 min read System Design Interview: Design a Pastebin / Code Snippet Service Designing Pastebin is a classic beginner-to-intermediate system design question that Read article

⏱ 6 min read System Design Fundamentals: CAP Theorem, Consistency, and Availability Understanding distributed systems fundamentals is essential for any system design interview. These Read article

⏱ 3 min read System Design Interview: Design a Real-Time Leaderboard (Top-K System) Real-time leaderboards rank users by score and are common in gaming, Read article

⏱ 3 min read System Design Interview: Design an Email System (like Gmail) Designing an email system covers distributed storage, message queuing, full-text search, Read article