5 min read System Design Interview: Design a Geospatial Service (Nearby Search) Geospatial services power “find restaurants near me,” Uber driver lookup, and […] Read article
5 min read System Design Interview: Design a Cryptocurrency Exchange (Coinbase / Binance) A cryptocurrency exchange enables users to buy, sell, and trade Read article
5 min read System Design Interview: Design an E-Commerce Platform (Amazon / Shopify) An e-commerce platform handles product discovery, inventory management, order processing, Read article
5 min read Recursion and Memoization Interview Patterns Memoization transforms exponential recursive solutions into polynomial ones by caching subproblem results. In Python, @lru_cache Read article
5 min read System Design Interview: Distributed Transactions, 2PC, and the Saga Pattern When a business operation spans multiple microservices or databases, maintaining Read article
6 min read Interval DP and Advanced Dynamic Programming Patterns Interval DP solves optimization problems over contiguous subarrays or subsequences. The core idea: Read article
5 min read System Design Interview: Design a Real-Time Collaborative Editor (Google Docs) A collaborative editor allows multiple users to edit the same Read article
5 min read System Design Interview: Design a Feature Flag System Feature flags (feature toggles) enable teams to deploy code to production without Read article
6 min read Two Pointers and Sliding Window Interview Patterns Two pointers and sliding window are techniques that turn O(n²) brute-force solutions into Read article
5 min read System Design Interview: Design a Metrics and Monitoring System Every large tech company runs a custom metrics and monitoring platform. Read article
6 min read Graph Algorithm Interview Patterns: BFS, DFS, Dijkstra, Topological Sort Graph problems are a staple of coding interviews. The key is Read article
5 min read Segment Tree and Range Query Interview Patterns Segment trees solve range query problems — finding the sum, min, max, or Read article
5 min read System Design Interview: Design a Distributed Job Scheduler A distributed job scheduler runs tasks reliably across a cluster of machines. Read article
5 min read System Design Interview: Design a Live Video Streaming Platform (Twitch) Live streaming is fundamentally different from video-on-demand (Netflix/YouTube). A streamer Read article
6 min read Trie and String Matching Interview Patterns Tries (prefix trees) and string matching algorithms are a distinct category in coding interviews. Read article
