⏱ 7 min read Low-Level Design: Customer Support Ticketing System A ticketing system manages customer support requests from creation through resolution. It involves ticket […] Read article

⏱ 6 min read Low-Level Design: Inventory Management System An Inventory Management System (IMS) tracks product stock levels, warehouse locations, reorder triggers, and stock Read article

⏱ 6 min read Low-Level Design: Shopping Cart and Checkout System A shopping cart system manages item selection, inventory reservation, coupon application, pricing, and Read article

⏱ 7 min read Low-Level Design: Hotel Reservation System A hotel reservation system manages room inventory, bookings, availability checks, pricing, and cancellations. It is Read article

⏱ 5 min read System Design: Content Delivery Network (CDN) A CDN is a geographically distributed network of edge servers that caches and serves Read article

⏱ 5 min read Sharding and Data Partitioning: System Design Deep Dive Sharding (horizontal partitioning) splits a large dataset across multiple database nodes so Read article

⏱ 6 min read Low-Level Design: Bank Account Transaction System The bank account transaction system LLD models accounts, transactions, and balance management with strong Read article

⏱ 6 min read System Design: Distributed Tracing System (Jaeger/Zipkin-style) Distributed tracing tracks a single request as it propagates through microservices, allowing engineers to Read article

⏱ 6 min read Low-Level Design: Online Code Judge (LeetCode-style) The online code judge LLD involves designing a system that accepts code submissions, compiles Read article

⏱ 7 min read Low-Level Design: Splitwise (Expense Sharing App) The Splitwise LLD asks you to model a shared expense tracker where users add Read article

⏱ 6 min read Low-Level Design: Pub/Sub Message Broker A Pub/Sub (Publish-Subscribe) message broker decouples producers from consumers through named topics. Producers publish events; Read article

⏱ 7 min read Low-Level Design: Food Delivery App (DoorDash / Uber Eats) The food delivery app LLD question asks you to model the Read article

⏱ 6 min read Low-Level Design: Task Scheduler The Task Scheduler is a recurring LLD interview question at companies like Google, Meta, Airbnb, and Read article

⏱ 7 min read Consistent Hashing: System Design Deep Dive Consistent hashing is a distributed hashing scheme that minimises key remapping when nodes are Read article