Custom E-Commerce Platform

Project Background

This project was for a wholesale distributor who needed more flexibility than traditional e-commerce platforms could offer. Their requirements included tiered B2B pricing, real-time inventory across multiple warehouses, and custom fulfillment logic.

Key Features

Dynamic Pricing Engine

The pricing system supports complex rules including:

Customer-tier based pricing
Volume discounts with quantity breaks
Time-limited promotions
Contract-specific pricing

class PricingEngine
{
    public function calculatePrice(Product $product, Customer $customer, int $qty): Money
    {
        $basePrice = $product->base_price;

        // Apply tier discount
        $tierDiscount = $customer->tier->discount_percentage;
        $price = $basePrice->multiply(1 - $tierDiscount / 100);

        // Apply volume discount
        $volumeBreak = $product->volumeBreaks()
            ->where('min_quantity', '<=', $qty)
            ->orderBy('min_quantity', 'desc')
            ->first();

        if ($volumeBreak) {
            $price = $price->multiply(1 - $volumeBreak->discount / 100);
        }

        // Check for contract pricing
        $contractPrice = $customer->contractPrices()
            ->where('product_id', $product->id)
            ->active()
            ->first();

        if ($contractPrice) {
            return min($price, $contractPrice->price);
        }

        return $price;
    }
}

Real-Time Inventory System

Inventory is tracked across multiple warehouses with:

WebSocket updates for live stock levels
Automatic low-stock alerts
Reserved inventory for pending orders
Integration with warehouse management systems

Smart Order Routing

Orders are automatically routed to the optimal fulfillment location based on:

Proximity to shipping address
Current stock levels
Shipping cost optimization
Carrier availability

Technical Stack

Backend

Laravel 10 - Application framework
MySQL - Primary database with read replicas
Redis - Session storage, caching, and queues
Horizon - Queue monitoring

Frontend

Vue.js 3 - Reactive UI components
Inertia.js - SPA without API complexity
Tailwind CSS - Utility-first styling

Infrastructure

AWS EC2 - Application servers
AWS RDS - Managed database
AWS S3 - Product images and documents
CloudFront - CDN for static assets

Performance Optimizations

Database query optimization reduced page load by 65%
Eager loading eliminated N+1 queries
Redis caching for product catalog
Image optimization and lazy loading

Outcome

The platform successfully launched and now handles over $2M in monthly transactions. The client was able to onboard new B2B customers faster and reduce fulfillment errors significantly.

Problem

Solution

Results