startup
Tekish
Modern High-Performance E-Commerce & Order Ecosystem
The Problem
The monolithic PHP storefront had a 4.8s LCP and couldn't handle Black Friday traffic spikes — resulting in a 34% cart abandonment rate and $18K in lost revenue during the previous peak season.
The Solution
Migrated to a headless architecture: Next.js ISR for product pages (rebuilt every 60s) + serverless Node.js functions for checkout. Redis-backed inventory reservation with a 10-minute TTL prevents overselling under concurrent load without database lock contention. Deployed to Vercel Edge across 30+ regions for sub-10ms TTFB globally.
My Role
Lead Full-Stack Web Developer
Timeline
4 months
Product
Architecture
Frontend
Next.js Static/ISR
Backend
Node.js Serverless Functions
Realtime
Webhooks
Infrastructure
Vercel Edge Network
Tech Stack
Impact
Reduced LCP from 4.8s to 1.2s by replacing server-rendered PHP pages with Next.js ISR + Vercel Edge — a 75% improvement that directly correlated with a 22% lift in checkout conversion rate (measured via A/B test over 30 days).
Designed a Redis-backed inventory reservation system with optimistic locking and TTL-based expiry, eliminating oversell errors under 200+ concurrent checkout attempts without introducing database row locks — previously causing transaction timeouts during flash sales.