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System Architecture Overview

Architecture Overview​

System Components​

Core Technology Stack​

Frontend Applications​

  1. Web Application

    • Framework: Remix
    • State Management: Remix built-in
    • API Client: GraphQL with Apollo Client
    • Styling: Tailwind CSS

  2. Android Application

    • Language: Kotlin
    • Architecture: MVVM
    • API Client: Apollo Android
    • Local Storage: Room Database

  3. iOS Application

    • Language: Swift
    • Architecture: MVVM
    • API Client: Apollo iOS
    • Local Storage: CoreData

Backend Infrastructure​

  1. API Layer

    • GraphQL API using Overblog GraphQL Bundle
    • JWT Authentication
    • CORS Configuration
    • Rate Limiting

  2. Application Server

    • Framework: Symfony 7
    • Environment: PHP 8.2+
    • ORM: Doctrine
    • Caching: Redis

  3. Database

    • PostgreSQL 15+
    • Replication for high availability
    • Automated backups
    • Data partitioning strategy

External Services Integration​

  1. Payment Processing

    • Multiple payment gateway support
    • Transaction logging
    • Reconciliation system

  2. Notification System

    • Push notifications
    • SMS integration
    • Email service
    • In-app messaging

  3. File Storage

    • Document storage
    • Image processing
    • Backup management

System Characteristics​

Scalability​

  • Horizontal scaling capabilities
  • Load balancing
  • Caching strategies
  • Database sharding preparation

Security​

  • End-to-end encryption
  • JWT based authentication
  • Role-based access control
  • Security audit logging

Availability​

  • High availability setup
  • Automated failover
  • Disaster recovery
  • Monitoring and alerts

Performance​

  • Response time optimization
  • Query optimization
  • Caching implementation
  • Resource optimization

Development Practices​

Code Management​

  • Git-based version control
  • GitLab CI/CD pipelines
  • Code review process
  • Documentation requirements

Testing Strategy​

  • Unit testing requirements
  • Integration testing
  • End-to-end testing
  • Performance testing

Deployment​

  • Environment management
  • Deployment procedures
  • Rollback strategies
  • Monitoring setup

Architecture Decisions​

GraphQL Implementation​

  • Single endpoint for all operations
  • Schema-first approach
  • Type safety across stack
  • Real-time capabilities with subscriptions

Authentication Flow​

  • JWT token-based auth
  • Refresh token mechanism
  • Session management
  • Multi-device support

Data Management​

  • Data consistency patterns
  • Caching strategies
  • Backup procedures
  • Data retention policies

Offline Capabilities​

  • Offline-first mobile apps
  • Data synchronization
  • Conflict resolution
  • Queue management

Infrastructure Setup​

Development Environment​

  • Local development setup
  • Docker containerization
  • Database management
  • Service mocking

Staging Environment​

  • Testing infrastructure
  • Data anonymization
  • Performance monitoring
  • Security testing

Production Environment​

  • High availability setup
  • Load balancing
  • Monitoring and logging
  • Backup systems

System Integration​

Internal Integration​

  • Service communication
  • Event handling
  • Message queuing
  • Cache synchronization

External Integration​

  • API documentation
  • Integration patterns
  • Error handling
  • Rate limiting

Monitoring and Logging​

System Monitoring​

  • Performance metrics
  • Resource utilization
  • Error tracking
  • Alert management

Application Logging​

  • Log aggregation
  • Log levels
  • Audit trails
  • Debug information

Security Monitoring​

  • Access logging
  • Security events
  • Vulnerability scanning
  • Intrusion detection

Disaster Recovery​

Backup Strategy​

  • Regular backups
  • Point-in-time recovery
  • Backup verification
  • Recovery testing

Business Continuity​

  • Failover procedures
  • Data center redundancy
  • Service restoration
  • Communication plan