Cloud-Native Order Management System (Microservices)

A production-ready cloud-native backend system built using Spring Boot microservices, MongoDB Atlas, Docker, and JWT authentication, designed for free-tier cloud deployment on Render.

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Architecture Overview

• Monorepo Microservices Architecture
• API Gateway Pattern
• Stateless JWT Authentication
• Independent service deployment

Client | API Gateway |

| | | User Service Order Service Inventory Service | MongoDB Atlas (Free Tier)

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🛠 Tech Stack

Layer	Technology
Backend	Java 17, Spring Boot 3
Database	MongoDB Atlas (Free Tier)
Security	JWT Authentication
Containers	Docker
CI/CD	GitHub Actions
Deployment	Render

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📦 Microservices

👤 User Service

• User registration and login
• JWT token generation
• Secure authentication
• MongoDB persistence

📦 Order Service

• Create and fetch orders
• Communicates with Inventory Service
• MongoDB order storage

📊 Inventory Service

• Product and stock management
• Stock validation on order placement
• MongoDB inventory storage

🌐 API Gateway

• Single entry point for all requests
• JWT validation
• Routes requests to backend services

🐳 Docker (Local Development)

docker-compose is used only for local development.
Render deploys each microservice independently.

docker-compose up --build

#Environment Variables
PORT=8080
MONGO_URI=mongodb+srv://<username>:<password>@cluster.mongodb.net/db
JWT_SECRET=super-secret-key