E-commerce Platform

The Challenge

The client was running their online retail operation on a legacy platform that couldn't handle traffic spikes, had no real-time inventory visibility across warehouses, and required manual intervention for order fulfillment. Checkout abandonment was high due to slow page loads and limited payment options. They needed a modern platform that could scale with their growth while automating the operational bottlenecks.

Our Approach

We started with a discovery phase focused on mapping the order lifecycle — from product browsing through payment, fulfillment, and delivery tracking. This revealed that inventory synchronization across multiple warehouses was the core technical challenge.

Next.js was chosen for the frontend to deliver server-rendered product pages with optimal load times — critical for conversion rates. The backend runs on Node.js with a domain-driven architecture separating catalog management, order processing, and inventory into distinct modules.

MongoDB handles the product catalog (where schema flexibility matters — different product categories have different attribute sets), while Redis manages session data, cart state, and real-time inventory counts. Payment processing integrates with multiple gateways through an abstraction layer that allows adding new providers without touching the order flow.

Key Technical Decisions

Optimistic inventory with reservation. Instead of locking inventory at browse time (which creates phantom stockouts), we reserve inventory only at checkout initiation and release it if the order isn't completed within 15 minutes. This maximizes sellable inventory while preventing overselling.

Edge-cached product pages. Product detail pages are statically generated at build time and cached at the CDN edge. Price and inventory data loads asynchronously from the API, giving users instant page loads while ensuring data freshness.

Webhook-driven fulfillment. Order completion triggers a webhook pipeline that notifies the warehouse management system, generates shipping labels, and sends customer notifications — all without manual intervention.

The Outcome

The platform launched after 10 weeks and immediately handled the client's peak traffic without degradation. Order processing is fully automated from payment through fulfillment. The real-time inventory system eliminated overselling, and the optimized frontend reduced checkout abandonment. We continue to evolve the platform with new features including a loyalty program and multi-currency support.