E-Commerce Platform
Scalable e-commerce platform handling 10K+ daily transactions with real-time inventory management and payment processing.
Overview
E-Commerce Platform is a production-grade storefront and admin system built to handle high volume while keeping UX crisp. The focus was end-to-end reliability: browsing, cart, checkout, inventory, and fulfillment.
Goal: scale to peak traffic without slowdowns. Constraint: maintain data correctness under concurrency (inventory + payments).
What shipped
- Storefront: search, filters, PDP, cart, and checkout
- Admin: catalog management, inventory controls, order status, and refunds
- Payments: secure Stripe integration with webhook validation
- Inventory: real-time updates with race-condition protections
Architecture
The system uses a modular backend with clear service boundaries and a frontend optimized for performance.
- Frontend: React + SSR patterns for faster first paint
- Backend: Node.js APIs with strong validation and idempotency
- Data: PostgreSQL as the source of truth + Redis caching
- Events: background jobs for emails, fulfillment, and webhook retries
Key technical details
- Idempotent checkout to prevent duplicate orders on refresh
- Stock reservations to avoid overselling during high demand
- Audit logs for admin actions
- Observability: structured logs + latency dashboards
Results
The platform sustained 10K+ daily transactions and improved checkout completion by simplifying steps and clarifying totals. Performance stayed strong via caching and optimized query patterns.
Links: architecture notes, API docs, and live demo.