This project guides students through building an E-commerce Backend System using a Microservices Architecture. Each service is developed independently with its own responsibilities, database, and codebase. The project introduces essential backend development practices such as authentication, inter-service communication, event-driven design, containerization, and API Gateway patterns.
By the end of the project, students will have hands-on experience in building, running, and deploying scalable microservices using modern tools and NodeJS-based frameworks.
| Epoch | Topic | Technologies & Concepts | Deliverables / Output |
|---|---|---|---|
| 1 | Introduction to Microservices & Architecture Monolith vs Microservices, service boundaries |
Microservice Architecture, Service Decomposition | System architecture diagram, service definitions |
| 2 | Build the User Service (ExpressJS) Registration, login, hashing, JWT generation, MongoDB connection |
ExpressJS, Mongoose, JWT, bcrypt | Functional user-service with authentication API |
| 3 | Build the Product Service (ExpressJS) CRUD products, input validation, clean folder structure |
ExpressJS, MongoDB, Joi | product-service with independent CRUD API |
| 4 | Build the Order Service (ExpressJS) Save order documents, use product & user IDs internally |
ExpressJS, MongoDB | order-service with basic order creation functionality |
| 5 | Notification Service using HonoJS Minimalistic logging or alert service |
HonoJS, REST API | notification-service for async logs/notifications |
| 6 | Event-Driven Architecture with RabbitMQ Publish/Subscribe model, message queue communication |
RabbitMQ, amqplib | Services publish and consume events asynchronously |
| 7 | JWT Authentication Across Services Token verification, middleware, role-based access control |
JWT, Express Middleware | All protected routes verify JWT correctly |
| 8 | API Gateway (Custom-built) Central routing, token checking, CORS handling |
ExpressJS, Gateway Pattern | A working api-gateway routing requests to services |
| 9 | Dockerize All Services Dockerfile per service, docker-compose, internal networking |
Docker, Docker Compose | All services containerized and connected in one system |
| 10 | Redis Caching for Product Service GET request caching, cache invalidation on update/delete |
Redis, ioredis | Cached product data with improved response time |
| 11 | Monitoring, Logging & CI/CD (Basic) Logging with Winston, health checks, CI/CD via GitHub Actions |
Winston, Morgan, Healthcheck, GitHub Actions | System logs + automated test/deploy pipeline |
| Category | Tools & Libraries |
|---|---|
| Languages | JavaScript (ES6+), NodeJS |
| Frameworks | ExpressJS, HonoJS |
| Databases | MongoDB (via Mongoose), Redis (caching) |
| Authentication | JSON Web Tokens (JWT), bcrypt |
| Message Broker | RabbitMQ, amqplib |
| API Gateway | Custom Express Gateway |
| Containerization | Docker, Docker Compose |
| Logging & Monitor | Winston, Morgan, Healthcheck Routes |
| CI/CD | GitHub Actions |
| Testing (Optional) | Postman, Thunder Client |