CosyIsland Headless Storefront

Development

Performance

Growth

CosyIsland's legacy storefront was losing mobile shoppers to slow page loads — with 90% of traffic on mobile, every millisecond mattered. We rebuilt the entire experience as a headless Next.js storefront, slashing initial load from ~10 seconds down to ~200ms globally, while adding a custom login and loyalty system to drive repeat purchases.

~200ms

First load

+100%

Scroll rate

+50%

Add to cart

+30%

Conversion

What we delivered

Headless Shopify storefront on Next.js with edge rendering for subsecond loads worldwide

Custom login and loyalty solution integrated with Shopify customer accounts

Mobile-first performance engineering — 90% of traffic comes from mobile devices

First meaningful paint reduced from ~10s to ~200ms, eliminating bounce from slow loads

Tech stack

Next.js

Shopify Storefront API

Vercel

TypeScript