🔷 Welcome to Day 1 of my Full-Stack Learning Challenge!
Over the next few weeks, I’ll be building SmartKart, a complete E-Commerce system using cutting-edge technologies and principles. This series will not only help me learn but also share back insights with the community 💡
🧠 Why SmartKart?
As a backend engineer, I wanted a project that showcases:
- Microservices using .NET 8, Clean Architecture, and DDD
- API Gateway, Service Discovery, and Message Brokering with RabbitMQ
- Caching with Redis
- Full-text search using Elasticsearch
- Secure Auth with JWT, OAuth2, and OpenID Connect
- ORM with EF Core, performance boosts with Dapper
- Future-ready: scalable frontend in React/React Native + Docker CI/CD
🏗️ Architecture Overview
🔹API Gateway
Acts as the single entry point, handling routing, authentication, rate limiting, etc.
🔹 Auth Service
Implements IdentityServer/OpenID for user login, registration, and token issuance.
🔹 Product, Order, Cart, and Payment Services
Each built as isolated microservices with their own DB, following Clean Architecture and DDD.
🔹Event Bus (RabbitMQ)
Enables asynchronous communication between services for tasks like inventory update, order placed, etc.
🔹 Redis
Used for caching product data and session tokens to boost performance.
🔹 Elasticsearch
For blazing-fast search experience in products and orders.
🔹 Service Registry (Consul/equivalent)
Enables service discovery for scalable deployment.
🔹 Database
Each service uses its own DB (PostgreSQL or SQL Server), connected via EF Core, and selectively using Dapper where performance is critical.
🔹 Dockerized Setup
All services will run locally in Docker containers to ensure production-like behavior without cloud dependency.
🗺️ Request Flow (Example)
1️⃣ A user logs in → Auth Service returns a JWT
2️⃣ API Gateway validates JWT and routes request to Product Service
3️⃣ Product Service fetches data (from DB or Redis), returns to Gateway
4️⃣ User adds product to cart → Cart Service updates DB and emits event to RabbitMQ
5️⃣ Order Service consumes the event and updates the order pipeline
6️⃣ All updates are searchable via Elasticsearch!
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