Low Level Design
Explore Low Level Design articles in System Design.
Low-Level Design (LLD) Learning Path
A structured, hands-on learning path for Low-Level Design covering SOLID principles, OOP design patterns, and 13 real-world LLD case studies including Parking Lot, Library, Movie Booking, Hotel, ATM, Elevator, Vending Machine, Notification System, URL Shortener, Cache Framework, Logging Framework, Rate Limiter, and Task Scheduler — all implemented in Java.
SOLID Principles — Complete Guide with Java Examples
Master all five SOLID principles with clear explanations, real-world analogies, before/after Java code, class diagrams, Spring Boot integration, and interview Q&A. Covers SRP, OCP, LSP, ISP, and DIP in depth.
Parking Lot System Design - Complete Low-Level Design Guide
Design a scalable Parking Lot System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, object-oriented design, SOLID principles, design patterns, parking allocation algorithms, concurrency handling, and real-world enterprise architecture.
Library Management System Design - Complete Low-Level Design Guide
Design a scalable Library Management System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, SOLID principles, design patterns, object-oriented modeling, concurrency, REST APIs, and enterprise architecture.
Movie Ticket Booking System Design - Complete Low-Level Design Guide
Design a scalable Movie Ticket Booking System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, seat booking algorithms, concurrency handling, payment integration, SOLID principles, design patterns, and enterprise architecture.
Hotel Reservation System Design - Complete Low-Level Design Guide
Design a scalable Hotel Reservation System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, room inventory, booking lifecycle, pricing strategy, payment handling, concurrency control, SOLID principles, design patterns, and enterprise architecture.
ATM System Design - Complete Low-Level Design Guide
Design a scalable ATM System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, cash dispensing algorithms, transaction processing, security, concurrency, SOLID principles, design patterns, and enterprise architecture.
Elevator System Design - Complete Low-Level Design Guide
Design a scalable Elevator Control System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, elevator scheduling algorithms, concurrency, SOLID principles, design patterns, state machines, and enterprise architecture.
Vending Machine System Design - Complete Low-Level Design Guide
Design a scalable Vending Machine System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, inventory management, payment processing, state machine design, SOLID principles, design patterns, concurrency, and enterprise architecture.
Notification System Design - Complete Low-Level Design Guide
Design a scalable Notification System using Java and Spring Boot. Learn requirement analysis, UML class diagrams, multi-channel notifications, templates, retries, scheduling, user preferences, SOLID principles, design patterns, and enterprise architecture.
URL Shortener LLD - Low-Level Design Guide
Design a URL Shortener at the class level using Java. Covers encoding strategies (Base62, MD5), storage model, redirect flow, URL expiry, analytics, rate limiting, and a complete class diagram — built with SOLID principles and OOP design patterns.
Cache Frameworks
Learn enterprise caching frameworks with Java and Spring Boot. Understand Caffeine, Redis, Hazelcast, Ehcache, Infinispan, Apache Ignite, cache architectures, cache consistency, cache eviction, and best practices.
Java Logging Frameworks
Master Java Logging Frameworks with Spring Boot. Learn SLF4J, Logback, Log4j2, JUL, MDC, Structured Logging, JSON Logging, Async Logging, Log Levels, Best Practices, and Enterprise Logging Architecture.
Rate Limiter Design - Complete Low-Level Design Guide
Design a scalable Rate Limiter using Java and Spring Boot. Learn Token Bucket, Leaky Bucket, Fixed Window, Sliding Window, Redis implementation, distributed rate limiting, SOLID principles, design patterns, and enterprise architecture.
Task Scheduler Design - Complete Low-Level Design Guide
Learn how to design a scalable Task Scheduler using Java and Spring Boot. Cover scheduling algorithms, cron jobs, delayed tasks, retries, distributed scheduling, Quartz, thread pools, job persistence, clustering, and enterprise architecture.