Microservices-Based Crypto Trading Platform Development

Burency is a modern crypto trading exchange that provides users with the ability to buy, sell, and trade cryptocurrencies in real-time. The platform is built using a robust microservices architecture, with support for fiat integration, spot/futures trading, and real-time notifications. It is designed for high throughput, scalability, and security.

1. Auth Service

Handles authentication and authorization using JWT (access and refresh tokens).

Implements role-based access control.

On user registration, Kafka events propagate user info to other services.

Secure token handling with token blacklisting and rotation logic.

2. User Service

Stores and manages user data (profile, KYC, settings).

Supports full CRUD operations on user entities.

Integrates with file service for KYC documents.

3. Banking Engine

Creates and manages multi-currency accounts for users (default: AED).

Handles fiat deposit (manual admin approval) and crypto transfers.

Supports withdrawals in both crypto and fiat.

4. Machine Engine (Trading Core)

Integrates with CCXT to fetch live market data and place trades.

Implements spot and futures trading, order books, and chart data.

Uses Socket.IO for real-time updates and data streams.

Multiple crypto trading pairs supported.

5. File Upload Service

Integration with AWS S3 for secure and scalable file storage.

Stores file metadata (type, name, public/private URLs).

Used for user profile images, KYC documents, etc.

6. Notification Service

Manages push, email, and SMS notifications.

Supports user-specific preferences (on/off per channel and event).

Uses Kafka topic SEND_NOTIFICATION to receive events from other services.

Sends optimized mass notifications via Firebase Cloud Messaging (FCM).

7. Frontend (React)

Developed in React.js with a real-time SPA experience.

Integrates Socket.IO for market data updates.

Provides trading interface, graphs, order books, user dashboards, etc.

8. API Gateway

Central entry point for all client requests.

Handles routing, security, and load balancing.

Applies rate limits and authentication middleware.

9. Common NPM Package (Shared Library)

A private NPM package used across all Node.js services.

Includes reusable modules:

Reduces code duplication and enforces consistency across microservices.