System Architecture

This document describes the architecture of the HostingCo system, including its components, data flow, and design principles.

Architecture Overview

The HostingCo system is a modern, microservices-oriented web application built with scalability, security, and maintainability in mind.

High-Level Architecture

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   Frontend      │    │   Backend API   │    │   Database      │
│   (React)       │◄──►│   (Node.js)     │◄──►│   (PostgreSQL)  │
│   Port: 3000    │    │   Port: 3003    │    │   Port: 5432    │
└─────────────────┘    └─────────────────┘    └─────────────────┘
                                │
                                ▼
                       ┌─────────────────┐
                       │   Cache Layer   │
                       │   (Redis)       │
                       │   Port: 6379    │
                       └─────────────────┘

Design Principles

1. Separation of Concerns

Frontend: User interface and client-side logic
Backend: Business logic, API endpoints, and data processing
Database: Data persistence and relationships
Cache: Performance optimization and session storage

2. Scalability

Horizontal scaling through stateless backend services
Database pooling and connection management
Caching strategies for improved performance
Load balancing ready architecture

3. Security

Zero trust security model
Defense in depth with multiple security layers
Principle of least privilege access control
Encryption at rest and in transit

4. Maintainability

Modular architecture with clear boundaries
Consistent coding standards and patterns
Comprehensive testing at all levels
Extensive documentation and examples

System Components

Frontend Application

  • Built with React and modern JavaScript
  • Responsive design with Tailwind CSS
  • Component-based architecture
  • State management with Redux/Context API

Backend API

  • Node.js with Express.js framework
  • RESTful API design
  • JWT authentication
  • Middleware for security and logging

Database Layer

  • PostgreSQL for primary data storage
  • Knex.js for database migrations
  • Connection pooling for performance
  • Backup and recovery strategies