Multi-Vendor E-Commerce Platform

Business Problem

The client needed a scalable marketplace solution that could onboard hundreds of vendors, process thousands of daily transactions, and maintain sub-second response times during peak shopping seasons while ensuring PCI compliance and preventing overselling.

Solution

Architected a multi-tenant Laravel application with vendor isolation, Redis-powered real-time inventory queues, Stripe Connect for split payments, and an event-driven architecture for order processing and notification delivery across the platform.

Architecture

Modular monolith with service-oriented layers: Vendor Management Module, Product Catalog Service, Order Processing Engine, Payment Gateway Abstraction, and Admin Analytics Hub. Uses queue workers for async tasks and Redis for session caching and real-time inventory locks.

Challenges

Handling race conditions during high-concurrency checkout, implementing fair vendor commission splitting, designing a dynamic shipping rate engine that works across 50+ carriers, and building a search system that indexes 100K+ products with faceted filtering.

Performance Optimizations

Implemented database read replicas for report queries, eager-loading optimization reduced N+1 queries by 94%, Redis caching layer for product catalog achieving 98% cache hit rate, and query chunking for bulk inventory updates processing 10K records per second.

Key Features