Components
System Components Detail
Microservices Architecture
User Service
User management, authentication, profiles
Node.js, JWT, bcrypt
AWS Cognito, RDS
Transaction Service
Transaction processing, history, validation
Java/Spring Boot
Arbitrum L3, RDS, Oracle
Payment Service
Payment processing, settlements
Node.js, Express
HiFi API, Redis
KYC Service
Identity verification, compliance
Python, FastAPI
Sumsub, S3, RDS
Notification Service
Push, SMS, Email notifications
Node.js
AWS SNS, SES
Audit Service
Logging, compliance reporting
Python
CloudWatch, S3
AI/LLM Options Comparison
OpenAI GPT-4
Most capable, extensive training
Complex conversations, analysis
Per token
Anthropic Claude
Safety-focused, reliable
Customer support, compliance
Per token
AWS Bedrock
AWS integrated, multiple models
AWS ecosystem integration
Per token + AWS
Google Vertex AI
Google ecosystem, PaLM models
Multi-modal applications
Per request
Database Architecture
AWS RDS Aurora PostgreSQL:
• Auto-scaling read replicas for high availability
Automatic scaling based on demand and traffic patterns
Multiple read replicas distributed across availability zones
Load balancing for optimal read performance
• Point-in-time recovery and automated backups
Continuous backup with 35-day retention period
Point-in-time recovery to any second within the backup window
Automated daily backups with configurable backup windows
• Encryption at rest using AWS KMS
AES-256 encryption for all database storage
AWS Key Management Service integration for key rotation
Encrypted backup files and database snapshots
• Multi-AZ deployment for disaster recovery
Synchronous replication across multiple availability zones
Automatic failover capabilities for high availability
Cross-region backup replication for disaster recovery scenarios
Service Details
User Service
Core Functionality:
User account creation, modification, and lifecycle management
Authentication and authorization using JWT tokens
User profile management and preferences storage
Password encryption using bcrypt for secure storage
Technology Stack:
Runtime: Node.js for scalable server-side JavaScript execution
Security: JWT for stateless authentication and bcrypt for password hashing
Integration: AWS Cognito for identity management and RDS for data persistence
Transaction Service
Core Functionality:
Real-time transaction processing and validation
Transaction history management and reporting
Balance calculations and account reconciliation
Integration with blockchain networks for immutable records
Technology Stack:
Framework: Java Spring Boot for enterprise-grade application development
Integration: Arbitrum L3 blockchain, RDS database, and Oracle systems
Features: High-performance transaction processing with audit trails
Payment Service
Core Functionality:
Payment gateway integration and processing
Settlement management and reconciliation
Multi-currency payment support
Real-time payment status updates
Technology Stack:
Runtime: Node.js with Express framework for RESTful API development
Integration: HiFi API for payment processing and Redis for caching
Performance: High-throughput payment processing with sub-second response times
KYC Service
Core Functionality:
Identity verification and document authentication
Compliance monitoring and reporting
Risk assessment and fraud detection
Regulatory requirement management
Technology Stack:
Framework: Python FastAPI for high-performance API development
Integration: Sumsub for identity verification, S3 for document storage, RDS for data management
Compliance: Automated AML/KYC processes with real-time verification
Notification Service
Core Functionality:
Multi-channel notification delivery (push, SMS, email)
Real-time notification routing and delivery
Notification preferences and subscription management
Delivery status tracking and analytics
Technology Stack:
Runtime: Node.js for event-driven notification processing
Integration: AWS SNS for push notifications and AWS SES for email delivery
Scalability: Auto-scaling based on notification volume
Audit Service
Core Functionality:
Comprehensive system logging and audit trail maintenance
Compliance reporting and regulatory documentation
Security event monitoring and alerting
Data retention and archival management
Technology Stack:
Language: Python for data processing and analysis
Integration: CloudWatch for monitoring and S3 for long-term storage
Compliance: Automated compliance reporting with configurable retention policies
Architecture Benefits
Scalability
Microservices Design: Independent scaling of individual services based on demand
Auto-scaling Infrastructure: Automatic resource allocation during peak usage
Load Balancing: Distributed traffic handling across multiple service instances
Reliability
Fault Isolation: Service failures contained within individual microservices
Redundancy: Multiple availability zone deployment for high availability
Backup and Recovery: Automated backup systems with point-in-time recovery
Security
Service Isolation: Each microservice operates in isolated environments
Encryption: End-to-end encryption for data in transit and at rest
Access Control: Role-based access control with JWT authentication
Maintainability
Technology Diversity: Best-fit technology selection for each service
Independent Deployment: Individual service updates without system-wide downtime
Clear Separation: Well-defined service boundaries and responsibilities
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