{"id":13514773,"url":"https://github.com/ashishps1/awesome-low-level-design","last_synced_at":"2025-09-27T07:31:18.703Z","repository":{"id":212990876,"uuid":"719980575","full_name":"ashishps1/awesome-low-level-design","owner":"ashishps1","description":"This repository contains low level design resources to improve coding skills and prepare for 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Lists","\u003ca name=\"Java\"\u003e\u003c/a\u003eJava"],"sub_categories":["Uncategorized","TeX Lists"],"readme":"\u003cp align=\"center\"\u003e\n  \u003cimg src=\"images/lld-repo-logo.png\" width=\"350\" height=\"200\"\u003e\n\u003c/p\u003e\n\u003cp align=\"center\"\u003e\n  \u003ca href=\"https://blog.algomaster.io/\"\u003eJoin Free Newsletter\u003c/a\u003e\n\u003c/p\u003e\n\nThis repository contains resources to learn Low Level Design (LLD) / Object Oriented Design (OOD) and prepare for interviews.\n\n## 📌 Fundamental Concepts\n\n- [Basics OOP Concepts](https://blog.algomaster.io/p/basic-oop-concepts-explained-with-code)\n- [SOLID Principles with Pictures](https://medium.com/backticks-tildes/the-s-o-l-i-d-principles-in-pictures-b34ce2f1e898)\n- [SOLID Principles with Code](https://blog.algomaster.io/p/solid-principles-explained-with-code)\n- [DRY Principle](https://blog.algomaster.io/p/082450d8-0e7b-4447-a8dc-b7308e45f048)\n- [YAGNI Principle](https://blog.algomaster.io/p/8c3c7da7-885b-4a9c-a6e4-70ee02de4772)\n- [KISS Principle](https://blog.algomaster.io/p/21b57678-b351-4ed4-b390-3b6308af2f7d)\n- [Coursera - Object-Oriented Design](https://www.coursera.org/learn/object-oriented-design)\n\n## ⚙️ Design Patterns\n\n| **Creational Patterns**                                                       | **Structural Patterns**                                         | **Behavioral Patterns**                                                                     |\n| ----------------------------------------------------------------------------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |\n| [Singleton](https://blog.algomaster.io/p/singleton-design-pattern)            | [Adapter](https://refactoring.guru/design-patterns/adapter)     | [Chain of Responsibility](https://refactoring.guru/design-patterns/chain-of-responsibility) |\n| [Factory Method](https://refactoring.guru/design-patterns/factory-method)     | [Bridge](https://refactoring.guru/design-patterns/bridge)       | [Command](https://refactoring.guru/design-patterns/command)                                 |\n| [Abstract Factory](https://refactoring.guru/design-patterns/abstract-factory) | [Composite](https://refactoring.guru/design-patterns/composite) | [Iterator](https://refactoring.guru/design-patterns/iterator)                               |\n| [Builder](https://refactoring.guru/design-patterns/builder)                   | [Decorator](https://refactoring.guru/design-patterns/decorator) | [Mediator](https://refactoring.guru/design-patterns/mediator)                               |\n| [Prototype](https://refactoring.guru/design-patterns/prototype)               | [Facade](https://refactoring.guru/design-patterns/facade)       | [Memento](https://refactoring.guru/design-patterns/memento)                                 |\n|                                                                               | [Flyweight](https://refactoring.guru/design-patterns/flyweight) | [Observer](https://refactoring.guru/design-patterns/observer)                               |\n|                                                                               | [Proxy](https://refactoring.guru/design-patterns/proxy)         | [State](https://refactoring.guru/design-patterns/state)                                     |\n|                                                                               |                                                                 | [Strategy](https://refactoring.guru/design-patterns/strategy)                               |\n|                                                                               |                                                                 | [Template Method](https://refactoring.guru/design-patterns/template-method)                 |\n|                                                                               |                                                                 | [Visitor](https://refactoring.guru/design-patterns/visitor)                                 |\n\n## 🗂️ UML\n- [Class Diagram](https://blog.algomaster.io/p/uml-class-diagram-explained-with-examples)\n- [Use Case Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-use-case-diagram/)\n- [Sequence Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-sequence-diagram/)\n- [Activity Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-activity-diagram/)\n- [State Machine Diagram](https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-state-machine-diagram/)\n\n## ✅ [How to Answer a LLD Interview Problem](https://blog.algomaster.io/p/how-to-answer-a-lld-interview-problem)\n\u003cimg src=\"images/interview-template.png\" width=\"350\" height=\"250\"\u003e\n\n## 💻 Low Level Design Interview Problems\n### Easy\n\n- [Design Parking Lot](problems/parking-lot.md)\n- [Design a Vending Machine](problems/vending-machine.md)\n- [Design Stack Overflow](problems/stack-overflow.md)\n- [Design Logging Framework](problems/logging-framework.md)\n- [Design Coffee Vending Machine](problems/coffee-vending-machine.md)\n- [Design Traffic Signal Control System](problems/traffic-signal.md)\n- [Design a Task Management System](problems/task-management-system.md)\n\n### Medium\n\n- [Design Pub Sub System](problems/pub-sub-system.md)\n- [Design Tic Tac Toe Game](problems/tic-tac-toe.md)\n- [Design Car Rental System](problems/car-rental-system.md)\n- [Design an ATM](problems/atm.md)\n- [Design Hotel Management System](problems/hotel-management-system.md)\n- [Design LinkedIn](problems/linkedin.md)\n- [Design a Social Network like Facebook](problems/social-networking-service.md)\n- [Design an Elevator System](problems/elevator-system.md)\n- [Design a Library Management System](problems/library-management-system.md)\n- [Design Restaurant Management System](problems/restaurant-management-system.md)\n- [Design Airline Management System](problems/airline-management-system.md)\n- [Design a Digital Wallet System](problems/digital-wallet-system.md)\n- [Design an Online Auction System](problems/online-auction-system.md)\n- [Design a Concert Ticket Booking System](problems/concert-ticketing-system.md)\n- [Design a Cache using LRU Eviction Policy](problems/lru-cache.md)\n\n### Hard\n\n- [Design Movie Ticket Booking System](problems/movie-ticket-booking-system.md)\n- [Design Splitwise](problems/splitwise.md)\n- [Design a Snake and Ladder game](problems/snake-and-ladder.md)\n- [Design Online Shopping System like Amazon](problems/online-shopping-service.md)\n- [Design Online Stock Brokerage System](problems/online-stock-brokerage-system.md)\n- [Design CricInfo](problems/cricinfo.md)\n- [Design Chess Game](problems/chess-game.md)\n- [Design Ride-Sharing Service (like Uber)](problems/ride-sharing-service.md)\n- [Design Online Food Delivery Service (like Swiggy)](problems/food-delivery-service.md)\n- [Design Music Streaming Service (like Spotify)](problems/music-streaming-service.md)\n- [Design University Course Registration System](problems/course-registration-system.md)\n\n## 📚 Books\n\n- [Head First Design Patterns](https://www.amazon.in/dp/9385889753)\n- [Clean Code](https://www.amazon.in/dp/B001GSTOAM)\n- [Refactoring: Improving the Design of Existing Code](https://www.amazon.in/dp/0134757599)\n\n## 📩 Newsletter\n\n- [AlgoMaster Newsletter](https://blog.algomaster.io/)\n\n## Additional resources\n\n- [Coursera - Design Patterns](https://www.coursera.org/learn/design-patterns)\n- [Github - Awesome Design Patterns](https://github.com/DovAmir/awesome-design-patterns)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fashishps1%2Fawesome-low-level-design","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fashishps1%2Fawesome-low-level-design","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fashishps1%2Fawesome-low-level-design/lists"}