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# Architecture Design Discussion

**Model:** GPT-4  
**Date:** 2/12/2026

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**You:**

How should I structure a microservices architecture for an e-commerce platform?

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**AI:**

Here's a recommended microservices architecture for e-commerce:

1. **API Gateway** - Routes requests, handles auth
2. **User Service** - Registration, profiles, auth tokens
3. **Product Catalog** - CRUD for products, categories, search
4. **Order Service** - Order lifecycle management
5. **Payment Service** - Stripe/PayPal integration
6. **Notification Service** - Email, SMS, push notifications

Use event-driven communication (RabbitMQ or Kafka) between services for loose coupling.

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**You:**

What about the database strategy?

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**AI:**

Each microservice should own its data (Database per Service pattern):

- **User Service** → PostgreSQL (relational data)
- **Product Catalog** → MongoDB (flexible schema)
- **Order Service** → PostgreSQL (transactions)
- **Payment Service** → PostgreSQL (ACID compliance)
- **Notification Service** → Redis (queue + cache)

Use the Saga pattern for distributed transactions across services.

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