Tranzor is a serverless, real-time financial transaction processing system designed to address the scalability, security, and performance challenges faced by financial institutions. It is built with modern cloud-native technologies, Tranzor provides comprehensive transaction monitoring, fraud detection, and audit capabilities.

Tranzor enables financial institutions to:

• Process transactions in real-time with sub-100ms latency
• Detect fraud automatically using AI-powered scoring algorithms
• Maintain complete audit trails for compliance and security
• Scale seamlessly from hundreds to millions of transactions per day
• Monitor system health with comprehensive metrics and alerting

graph TB
    subgraph "Client Applications"
        A[Web Dashboard]
        B[Mobile App]
        C[Third-party Integrations]
        D[API Clients]
    end
    
    subgraph "Frontend Layer"
        E[React SPA]
        F[Authentication]
        G[Real-time Updates]
    end
    
    subgraph "API Gateway"
        H[AWS API Gateway]
        I[Rate Limiting]
        J[Request Validation]
        K[CORS Management]
    end
    
    subgraph "Backend Services"
        L[Transaction Processing]
        M[Fraud Detection]
        N[User Management]
        O[Audit Logging]
    end
    
    subgraph "Data Layer"
        P[(DynamoDB - Transactions)]
        Q[(DynamoDB - Users)]
        R[(DynamoDB - Audit Logs)]
        S[(DynamoDB - Fraud Alerts)]
    end
    
    subgraph "Message Queue"
        T[SQS - Transaction Queue]
        U[SQS - Fraud Queue]
    end
    
    subgraph "Authentication"
        V[AWS Cognito]
        W[JWT Tokens]
    end
    
    subgraph "Monitoring"
        X[CloudWatch Metrics]
        Y[CloudWatch Logs]
        Z[Custom Dashboards]
    end
    
    A --> E
    B --> E
    C --> H
    D --> H
    E --> F
    F --> V
    V --> W
    H --> I
    I --> J
    J --> K
    K --> L
    K --> M
    K --> N
    K --> O
    L --> T
    T --> L
    M --> U
    U --> M
    L --> P
    M --> S
    N --> Q
    O --> R
    L --> X
    M --> X
    X --> Y
    Y --> Z

sequenceDiagram
    participant Client
    participant API Gateway
    participant Lambda
    participant SQS
    participant DynamoDB
    participant Fraud Engine
    participant Audit System
    
    Client->>API Gateway: POST /transactions
    API Gateway->>Lambda: Process Transaction
    Lambda->>SQS: Queue Transaction
    Lambda->>Client: 202 Accepted
    
    SQS->>Lambda: Trigger Processor
    Lambda->>DynamoDB: Store Transaction
    Lambda->>Fraud Engine: Check for Fraud
    Fraud Engine->>Lambda: Fraud Score
    
    alt Fraud Detected
        Lambda->>DynamoDB: Create Fraud Alert
        Lambda->>Audit System: Log Alert
    end
    
    Lambda->>Audit System: Log Transaction
    Lambda->>DynamoDB: Update Status
    Lambda->>Client: WebSocket Update

sequenceDiagram
    participant User
    participant Frontend
    participant Cognito
    participant API Gateway
    participant Lambda
    participant DynamoDB
    
    User->>Frontend: Login Request
    Frontend->>Cognito: Authenticate
    Cognito->>Frontend: JWT Token
    Frontend->>User: Dashboard Access
    
    User->>Frontend: API Request
    Frontend->>API Gateway: Request + JWT
    API Gateway->>Cognito: Validate Token
    Cognito->>API Gateway: Token Valid
    API Gateway->>Lambda: Process Request
    Lambda->>DynamoDB: Access Data
    Lambda->>API Gateway: Response
    API Gateway->>Frontend: Data
    Frontend->>User: Display Results

Tranzor/
├── frontend/                    # React-based web application
│   ├── src/
│   │   ├── components/         # Reusable UI components
│   │   ├── pages/             # Page components
│   │   ├── store/             # Redux store and API slices
│   │   ├── services/          # API services and mock data
│   │   ├── hooks/             # Custom React hooks
│   │   └── contexts/          # React contexts
│   ├── public/                # Static assets
│   └── package.json           # Frontend dependencies
├── backend/
│   └── tranzor-api/           # AWS SAM backend application
│       ├── src/               # Lambda function source code
│       ├── events/            # Test events
│       ├── __tests__/         # Unit tests
│       ├── template.yml       # AWS SAM template
│       └── package.json       # Backend dependencies
├── docs/                      # Documentation
├── scripts/                   # Deployment and utility scripts
└── README.md                  # This file

• Real-time Dashboard: Live transaction monitoring and metrics
• Transaction Management: Create, view, and manage transactions
• Fraud Alert System: Monitor and investigate fraud alerts
• Audit Trail: Complete system activity logging
• User Management: Secure authentication and user settings
• Mock Data System: Comprehensive testing environment

• Serverless Architecture: AWS Lambda-based microservices
• Real-time Processing: SQS-based message queuing
• Fraud Detection: AI-powered scoring algorithms
• Audit Logging: Complete activity tracking
• Auto-scaling: Automatic resource scaling
• High Availability: Multi-AZ deployment

• AWS Cognito: Secure user authentication
• JWT Tokens: Stateless authentication
• Encryption: Data encrypted at rest and in transit
• IAM Roles: Least privilege access control
• API Security: Rate limiting and validation

• React 18: Modern UI framework
• Vite: Fast build tool and dev server
• Ant Design: Enterprise UI component library
• Redux Toolkit: State management
• RTK Query: API data fetching
• React Router: Client-side routing
• AWS Cognito: Authentication

• AWS SAM: Serverless application model
• AWS Lambda: Serverless compute
• Amazon DynamoDB: NoSQL database
• Amazon SQS: Message queuing
• API Gateway: REST API management
• AWS Cognito: User authentication
• CloudWatch: Monitoring and logging

• AWS CloudFormation: Infrastructure as code
• Jest: Testing framework
• ESLint: Code linting

• Throughput: 10,000+ transactions per second
• Latency: < 100ms for transaction processing
• Availability: 99.9% uptime SLA
• Concurrent Users: 10,000+ simultaneous users

• Real-time Metrics: Transaction rate, latency, error rates
• System Health: Lambda function performance, queue depth
• Business Metrics: Fraud detection rate, transaction volume
• Custom Dashboards: Operational and business intelligence

• Node.js 18+
• AWS CLI configured
• AWS SAM CLI

1. Clone the Repository

   git clone https://github.com/your-org/tranzor.git
   cd tranzor

2. Frontend Setup

   cd frontend
   npm install
   cp env.example .env.local
   # Update .env.local with your AWS Cognito settings
   npm run dev

3. Backend Setup

   cd backend/tranzor-api
   npm install
   sam build
   sam deploy --guided

4. Access the Application

   • Frontend: http://localhost:5173
   • Backend API: Available via AWS API Gateway

cd frontend
npm test                    # Unit tests
npm run test:coverage      # Coverage report
npm run test:e2e          # End-to-end tests

cd backend/tranzor-api
npm test                   # Unit tests
sam local start-api       # Local API testing
sam local invoke          # Lambda function testing

# Run full integration tests
npm run test:integration

• Manual deployment from main branch
• Blue-green deployment strategy
• Comprehensive monitoring and alerting

# Development
npm run deploy:dev

# Staging
npm run deploy:staging

# Production
npm run deploy:prod

• Encryption: AES-256 encryption at rest, TLS 1.2+ in transit
• Access Control: Role-based access control (RBAC)
• Audit Logging: Complete activity tracking
• Compliance: SOC 2, PCI DSS, GDPR ready

Tranzor - Powering the future of financial transaction processing with modern, scalable, and secure technology.

Built with ❤️ by Me