E-commerce Expert Guide

This skill provides the standards for designing and implementing scalable, secure, and user-friendly online stores.

📦 Backend (MedusaJS)

• Modular Architecture: Use custom modules for specialized logic. Leverage module links for data associations.
• Workflows: Use Medusa Workflows for complex, long-running business processes (e.g., order fulfillment).
• Extensibility: Extend core entities using decorators and custom repositories.

🛒 Storefront Patterns

• Checkout Flow: Design frictionless, multi-step checkouts. Ensure state persistence across sessions.
• Product Discovery: Implement fast search and filtering (e.g., Meilisearch or Algolia).
• Cart Management: Handle local and server-side cart synchronization gracefully.

💳 Payments & Security

• Integration: Use official plugins for Stripe, PayPal, etc. Implement webhooks for status updates.
• Compliance: Ensure PCI DSS compliance. Never store sensitive card data on your servers.
• Fraud Prevention: Implement rate limiting and basic fraud checks on checkout attempts.

🔗 References

• Medusa Documentation
• Next.js Commerce Starter