System Design Interview: Design a Real-Time Analytics Dashboard
What Is a Real-Time Analytics Dashboard? A real-time analytics dashboard displays live metrics and aggregations over streaming data: active users, […]
System Design
System Design
System Design Interview: Design an E-Commerce Order and Checkout System
What Is an E-Commerce Order System? An e-commerce order system manages the full lifecycle of an online purchase: cart management,
System Design
System Design Interview: Design a Code Review and Pull Request Platform
What Is a Code Review Platform? A code review platform allows developers to propose code changes (pull requests), receive line-by-line
Algorithms
Segment Tree and Fenwick Tree Interview Patterns: Range Queries and Updates
Segment Tree and Fenwick Tree (BIT) Interview Patterns These data structures answer range queries (sum, min, max) and support point
System Design
System Design Interview: Design a Ride-Sharing App (Uber/Lyft Dispatch)
What Is a Ride-Sharing System? A ride-sharing platform matches riders requesting trips with nearby available drivers in real time, computes
System Design
System Design Interview: Design a Hotel Reservation System
What Is a Hotel Reservation System? A hotel reservation system manages room inventory, bookings, availability search, and payments for hotels.
System Design
System Design Interview: Design a Social Media Feed System
What Is a Social Media Feed System? A social media feed aggregates and ranks posts from followed users and surfaces
System Design
System Design Interview: Design a Content Moderation System
What Is a Content Moderation System? A content moderation system detects and removes harmful content (hate speech, spam, CSAM, misinformation,
Algorithms
Backtracking Algorithm Interview Patterns: Subsets, Permutations, N-Queens, Word Search
Backtracking Algorithm Patterns Backtracking is a systematic way to enumerate all possible solutions by building candidates incrementally and abandoning (pruning)
System Design
System Design Interview: Design a Fleet Management and Vehicle Tracking System
What Is a Fleet Management System? A fleet management system tracks the real-time location and status of thousands of vehicles
Algorithms
Advanced Graph Algorithms: SCC, Articulation Points, Dijkstra, MST
Advanced Graph Algorithms for Interviews Beyond BFS/DFS and basic shortest paths, interviews at senior levels test Tarjan’s algorithm for SCCs,
System Design
System Design Interview: Design a Subscription Billing System
What Is a Subscription Billing System? A subscription billing system automates recurring charges for SaaS products, streaming services, and membership
System Design
System Design Interview: Design a Multi-Tenant SaaS Platform
What Is a Multi-Tenant SaaS Platform? A multi-tenant SaaS platform serves multiple customers (tenants) from a single shared infrastructure. Each
System Design
System Design Interview: Design a Real-Time Gaming Leaderboard
What Is a Gaming Leaderboard System? A gaming leaderboard ranks players by score, showing top players globally, regionally, or among
System Design
System Design Interview: Design an Inventory Management System (Amazon/Shopify)
What Is an Inventory Management System? An inventory management system tracks stock levels across warehouses, prevents overselling, coordinates replenishment, and