E-Commerce / Full-Stack / Analytics

Clothify – Fashion E-Commerce & Analytics

Clothify is a production-grade, API-first fashion e-commerce platform featuring a versioned Express.js + MongoDB API (50+ REST endpoints across 12 modules) paired with a feature-sliced React frontend using RTK Query and HTTP-only JWT authentication.

Clothify – Fashion E-Commerce & Analytics

The Challenge

Fashion retailers need variant-level inventory tracking (size + color matrices per product), atomic checkouts that prevent stock race conditions during flash sales, multi-channel verification flows (Email + WhatsApp OTP), and real-time business intelligence dashboards. Off-the-shelf platforms lack the flexibility to handle these fashion-specific requirements without costly workarounds.

Our Solution

We built an API-first e-commerce system with a layered MVC backend (Express.js + MongoDB) and a feature-sliced React frontend. Checkout uses MongoDB sessions to atomically decrement variant-level stock and create orders in a single transaction. Stripe PaymentIntents are reconciled asynchronously via webhooks, while 8+ server-side aggregation pipelines power the admin analytics dashboard.

100%Race-condition-free atomic checkouts via Mongoose sessions
8+Server-side MongoDB aggregation pipelines for analytics
50+Versioned REST API endpoints across 12 route modules

Key Features Delivered

Atomic Order Processing with Mongoose Sessions

Checkout uses MongoDB sessions to atomically decrement variant-level stock and create the order in a single transaction, eliminating out-of-stock race conditions.

Stripe PaymentIntents & Webhook Sync

Server-side PaymentIntent creation within order transactions, reconciled asynchronously via Stripe webhooks to guarantee payment and fulfillment state consistency.

8+ Server-Side MongoDB Aggregation Pipelines

Admin dashboard computes revenue trends, order status distributions, user growth, category sales, and top-selling brands via performant server-side aggregations.

Multi-Channel Verification Pipeline

Crypto-token email verification + WhatsApp OTP delivery via Twilio with TTL-indexed auto-expiring documents and server-side Google reCAPTCHA v2 protection.

Variant-Level Size & Color Inventory Matrix

Fashion-tailored schema supporting multi-dimensional size/color matrix tracking per product, preventing overselling and reducing refund overhead.

Defense-in-Depth OWASP Security Engine

HTTP-only secure JWT cookies (eliminating XSS token theft), Helmet HTTP headers, Mongo query sanitization, HPP parameter pollution protection, and RBAC guards.

Clothify – Fashion E-Commerce & Analytics

The Impact

Clothify delivered transaction integrity during high-volume sales while providing fashion retailers with real-time inventory and sales intelligence.

  • Eliminated inventory race conditions during flash sales via atomic Mongoose transactions
  • Reduced customer verification friction with mobile-first Twilio WhatsApp OTP delivery
  • Delivered real-time sales intelligence without client-side computation via 8+ aggregation pipelines
  • Hardened customer data integrity with HTTP-only cookie JWTs and OWASP Top 10 security guards

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