9 min read System Design Interview: Design a Distributed Messaging System (Apache Kafka) Understanding distributed messaging systems is essential for senior engineering roles. […] Read article
8 min read String Manipulation Interview Patterns: Complete Guide (2025) String problems are ubiquitous in coding interviews — from anagram detection to complex Read article
6 min read System Design Interview: Design a Social Graph (Twitter Follow / LinkedIn Connect) Social graph design is a foundational problem asked Read article
9 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
9 min read System Design Interview: Design Dropbox / Google Drive (Cloud File Storage) Cloud file storage like Dropbox or Google Drive is Read article
6 min read System Design Interview: Design Google Search Autocomplete (Typeahead) Search autocomplete (typeahead) is one of the most common system design questions, 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
9 min read System Design Interview: Design a Hotel Booking System (Airbnb/Booking.com) Hotel booking systems are canonical system design problems testing inventory management, Read article
8 min read Monotonic Stack Patterns: Complete Interview Guide Monotonic stacks solve a specific family of problems related to “nearest greater/smaller element” queries 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
5 min read Database Indexing and Query Optimization for Interviews Database indexing questions appear frequently in system design interviews and sometimes as standalone Read article
4 min read System Design Interview: Design a Chat Application (WhatsApp) Designing a real-time messaging application like WhatsApp is a comprehensive system design Read article
