Eventify - Enterprise Task Management Platform

A production-ready, enterprise-grade task management SaaS platform built with modern backend technologies and microservices architecture.

🏗️ Architecture Overview

This project demonstrates enterprise-level backend architecture with a focus on scalability, security, and maintainability. Built using NestJS framework with a modular, microservices-ready design pattern.

Core Architecture Principles

• Clean Architecture with clear separation of concerns
• Repository Pattern for data access abstraction
• Dependency Injection for loose coupling
• Modular Design with feature-based organization
• Layered Architecture (Controller → Service → Repository)

🚀 Key Features

🔐 Enterprise Security

• JWT Authentication with refresh token rotation
• Role-Based Access Control (RBAC) with granular permissions
• OTP Verification for secure user onboarding
• Input Validation with class-validator decorators
• Rate Limiting and API protection
• Password Security with bcrypt hashing

💰 Subscription & Payment System

• Stripe Integration for payment processing
• Multi-tier Subscription Plans with feature limits
• Usage Tracking and quota management
• Subscription Validation for feature access control
• Payment Error Handling with proper HTTP status codes

📁 Cloud Infrastructure

• AWS S3 Integration for scalable file storage
• Presigned URLs for secure file access
• File Metadata Management with comprehensive tracking
• Upload/Download Operations with error handling

🔌 Real-time Collaboration

• WebSocket Implementation using Socket.io
• Real-time Chat with authentication
• User Presence Tracking and online status
• Message Broadcasting and room management

📊 Business Intelligence

• Comprehensive Logging and audit trails
• Admin Dashboard with system analytics
• Health Monitoring and performance metrics
• User Activity Tracking and reporting

🛠️ Technology Stack

Backend Framework

• NestJS 10.0.0 - Enterprise Node.js framework
• TypeScript 5.1.3 - Full type safety
• Node.js - Runtime environment

Database & ORM

• PostgreSQL - Primary database
• Prisma 6.13.0 - Type-safe database client
• Database Migrations - 53+ migration files

Authentication & Security

• Passport.js - Authentication middleware
• JWT - JSON Web Tokens
• bcrypt - Password hashing
• class-validator - Input validation

External Services

• Stripe - Payment processing
• AWS S3 - File storage
• Nodemailer - Email service
• Socket.io - Real-time communication

Development Tools

• Jest - Testing framework
• ESLint - Code linting
• Prettier - Code formatting
• Swagger - API documentation

📁 Project Structure

server/
├── src/
│   ├── core/                    # Core services & utilities
│   │   ├── prisma/             # Database service
│   │   ├── stripe/             # Payment integration
│   │   ├── s3/                 # AWS S3 service
│   │   ├── email/              # Email service
│   │   └── utils/              # Utility functions
│   ├── modules/                 # Feature modules
│   │   ├── auth/               # Authentication
│   │   ├── user/               # User management
│   │   ├── company/            # Company management
│   │   ├── task/               # Task management
│   │   ├── payment/            # Payment processing
│   │   ├── admin/              # Admin dashboard
│   │   └── chat/               # Real-time chat
│   ├── guards/                  # Authentication guards
│   ├── decorators/              # Custom decorators
│   └── main.ts                  # Application entry point
├── prisma/                      # Database schema & migrations
└── tests/                       # Test files

🔧 Installation & Setup

Prerequisites

• Node.js 18+
• PostgreSQL 13+
• Redis (optional, for caching)
• AWS S3 bucket
• Stripe account

Environment Variables

# Database
DATABASE_URL="postgresql://user:password@localhost:5432/eventify"

# JWT
JWT_SECRET="your-jwt-secret"
JWT_REFRESH_SECRET="your-refresh-secret"

# Stripe
STRIPE_SECRET_KEY="sk_test_..."
STRIPE_WEBHOOK_SECRET="whsec_..."

# AWS S3
S3_BUCKET_NAME="your-bucket"
S3_ACCESS_KEY_ID="your-access-key"
S3_SECRET_ACCESS_KEY="your-secret-key"
S3_BUCKET_REGION="us-east-1"

# Email
EMAIL_HOST="smtp.gmail.com"
EMAIL_USER="your-email"
EMAIL_PASSWORD="your-password"
EMAIL_FROM="noreply@eventify.com"

Installation Steps

# Clone repository
git clone https://github.com/Durbekjon/eventify
cd eventify/server

# Install dependencies
npm install

# Set up database
npx prisma migrate deploy
npx prisma generate

# Seed database (optional)
npm run seed

# Start development server
npm run dev

# Run tests
npm test

🚀 API Endpoints

Authentication

• POST /api/auth/login - User login
• POST /api/auth/register - User registration
• POST /api/auth/refresh - Refresh token
• POST /api/auth/restore - Password restoration

Task Management

• GET /api/tasks - Retrieve tasks with pagination
• POST /api/tasks - Create new task
• PUT /api/tasks/:id - Update task
• DELETE /api/tasks/:id - Delete task
• POST /api/tasks/reorder - Reorder tasks

Company & Workspace

• GET /api/companies - List companies
• POST /api/companies - Create company
• GET /api/workspaces - List workspaces
• POST /api/workspaces - Create workspace

Payment & Subscriptions

• POST /api/payment/create - Create payment intent
• POST /api/payment/confirm - Confirm payment
• GET /api/subscriptions - List subscriptions

🧪 Testing Strategy

Test Coverage

• Unit Tests: Service layer testing with Jest
• Integration Tests: API endpoint testing
• E2E Tests: Full application flow testing
• Mock Strategy: Comprehensive dependency mocking

Running Tests

# Unit tests
npm test

# Watch mode
npm run test:watch

# Coverage report
npm run test:cov

# E2E tests
npm run test:e2e

📊 Performance & Scalability

Database Optimization

• Connection Pooling for efficient database connections
• Query Optimization with Prisma query optimization
• Indexing Strategy for fast data retrieval
• Transaction Management for data consistency

API Performance

• Rate Limiting to prevent abuse
• Response Caching for static data
• Pagination for large datasets
• Efficient Queries with proper includes

Scalability Features

• Modular Architecture for horizontal scaling
• Stateless Design for load balancing
• External Service Integration for specialized functionality
• Configuration Management for environment-specific settings

🔒 Security Features

Authentication & Authorization

• JWT Token Management with proper expiration
• Role-Based Access Control with granular permissions
• Session Management with secure token storage
• Password Security with bcrypt hashing

Data Protection

• Input Validation to prevent injection attacks
• SQL Injection Prevention with Prisma ORM
• XSS Protection with proper output encoding
• CSRF Protection with token validation

API Security

• Rate Limiting to prevent abuse
• CORS Configuration for cross-origin requests
• Request Validation with DTOs
• Error Handling without information leakage

🚀 Deployment

Production Considerations

• Environment Configuration for different deployments
• Health Checks for monitoring
• Logging Strategy for debugging
• Error Monitoring for production issues

Docker Support

# Example Dockerfile
FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
RUN npm run build
EXPOSE 4000
CMD ["npm", "run", "prod"]

📈 Monitoring & Observability

Health Checks

• Database Connectivity monitoring
• External Service health checks
• Application Metrics collection
• Performance Monitoring and alerting

Logging Strategy

• Structured Logging with consistent format
• Log Levels for different environments
• Audit Trails for security compliance
• Error Tracking for debugging

🤝 Contributing

Development Workflow

1. Feature Branch creation
2. Code Review process
3. Testing requirements
4. Documentation updates

Code Standards

• TypeScript strict mode
• ESLint configuration
• Prettier formatting
• Test Coverage requirements

📄 License

This project is proprietary software developed for demonstration purposes.

👨‍💻 Developer Profile

Durbek Saydaliyev - Software Engineer

This project demonstrates expertise in:

• Enterprise Architecture and system design
• Security Implementation and best practices
• Database Design and optimization
• API Development and documentation
• Payment Integration and subscription management
• Real-time Communication and WebSocket implementation
• Cloud Infrastructure and external service integration
• Testing Strategies and quality assurance

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Built with ❤️ using modern backend technologies and enterprise-grade architecture patterns.