Mustafa Kazmi
Frontend Engineer Scalable Web Apps Performance & UX Focused
Case study: I rebuilt an activewear brand's entire storefront in 8 weeks — here's what happened to their revenue.
The client had a big problem. $4M/year in sales, but 71% of shoppers were abandoning their cart. Their Shopify theme loaded in 4.6 seconds. Every flash sale crashed the server.
Here's what I built and what changed:
→ Migrated from a legacy Liquid theme to a fully headless Next.js storefront
→ Implemented ISR so product pages load in under 400ms — even during traffic spikes
→ Built an optimistic slide-out cart that skips the 1.5s Shopify API delay entirely
→ Set up a Facebook CAPI proxy to recover conversion tracking lost to ad blockers
→ Gave the marketing team a Sanity CMS visual builder so they never need a dev again
Results after 60 days:
Page load: 4.6s → 0.8s (82% faster)
Conversion rate: +34.6%
Cart abandonment: down 18.3%
Revenue directly attributed: +$142,000
Stack: React 19, Next.js App Router, Sanity.io (http://Sanity.io), Shopify GraphQL, Vercel Edge, Upstash Redis, Facebook CAPI, Cloudflare
If your store is bleeding revenue due to slow load times or a rigid theme — let's talk.
1
2
154
Introducing Verdant UI
A shop for harvesting kits and and microgreens delivered at your footstep
1
2
165
I like the vibe of this UI.
Calm clean perfect for healing
Introducing serene healing UI
2
2
122
What do u think of this new design I have created using google ai studio and chatpt?
0
103