System Design Interview: Design Google Maps / Navigation System
7 min read System Design Interview: Design Google Maps / Navigation System Designing a mapping and navigation system like Google Maps is a […] Read article
System Design
System Design
Low-Level Design: Elevator System (OOP Design Interview)
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
Algorithms, System Design
Database Indexing and Query Optimization Interview Guide
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
System Design
System Design Interview: Design a Chat Application (WhatsApp)
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
System Design
Low-Level Design Interview: Design a Parking Lot System
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
Algorithms
Design Patterns in Python for Coding Interviews (2025)
4 min read Design Patterns in Python for Coding Interviews (2025) Python-specific design pattern implementations come up in senior coding rounds at Stripe, Read article
System Design
System Design Interview: How DNS Works and How to Design It
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
Algorithms
Trie Interview Patterns: Autocomplete, Word Search, and Prefix Problems (2025)
4 min read Trie Interview Patterns: Autocomplete, Word Search, and Prefix Problems (2025) Tries (prefix trees) are the go-to data structure for string Read article
System Design
System Design Interview: Design a Pastebin / Code Snippet Service
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
System Design
System Design Fundamentals: CAP Theorem, Consistency, and Replication
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
System Design
System Design Interview: Distributed Transactions (2PC, Saga Pattern)
3 min read System Design Interview: Distributed Transactions (2PC, Saga Pattern) Distributed transactions are one of the hardest problems in distributed systems. When Read article
System Design
System Design Interview: Design a Real-Time Leaderboard (Top-K System)
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
Algorithms
2D Dynamic Programming Interview Patterns (2025)
5 min read 2D Dynamic Programming Interview Patterns (2025) Two-dimensional DP problems are common at Google, Meta, Amazon, and Microsoft. They involve grids, Read article
System Design
System Design Interview: Design an Email System (Gmail)
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
System Design
System Design Interview: Design a Feature Flag System
5 min read System Design Interview: Design a Feature Flag System Feature flag (feature toggle) systems allow engineers to enable or disable features Read article