Design a Task Management System

Difficulty: Easy Source: awesome-low-level-design

Requirements

  1. Create, update, delete tasks
  2. Tasks have title, description, due date, priority, status
  3. Assign tasks to others, configure reminders
  4. Search and filter by priority, due date, user
  5. Mark complete, review history
  6. Handle concurrent access
  7. Extensible

Class Diagram

Class Diagram

Classes, Interfaces and Enumerations

Class/Interface Description
User id, name, email
TaskStatus Enum: pending, in progress, completed
Task id, title, description, due date, priority, status, assigned user
TaskManager Singleton; ConcurrentHashMap + CopyOnWriteArrayList for thread-safe task management

Design Patterns Used

Pattern Application
Singleton TaskManager has a single instance managing all tasks across the system

Code Implementations

Language Source Code
Java View on GitHub
Python View on GitHub
C++ View on GitHub
C# View on GitHub
Go View on GitHub