A Next.js rebuild that lifted conversion by 41%
Example success story · DTC ecommerce
Replacing a slow WordPress + WooCommerce stack with a custom Next.js + headless commerce build — faster, more conversion-friendly, and easier for marketing to ship on.
+41%
Site conversion rate
1.6s
Mobile LCP (was 4.2s)
+27%
Organic traffic (3 mo)
8 wk
From kickoff to launch
"We thought the conversion problem was creative. It turned out to be a 4.2 second LCP. Marketer Zilla rebuilt the stack and conversion went up before we changed a single ad."
Founder, DTC Brand (example)
Strategy
Ecommerce · DTC
Audit
Ecommerce · DTC
Execution
Ecommerce · DTC
Tracking
Ecommerce · DTC
Reporting
Ecommerce · DTC
Optimization
Ecommerce · DTC
The challenge
Slow Core Web Vitals, broken tracking, a CMS marketers couldn't use, and a checkout flow that lost users between PDP and add-to-cart.
Strategy
- Replatformed from WordPress/WooCommerce to Next.js 15 + headless commerce
- Custom design system tied to a Sanity CMS for marketer velocity
- Performance budget set at LCP < 2s, INP < 200ms
- Tracking and attribution rebuilt server-side with deduplicated events
Execution
- App Router + RSC build with edge middleware for personalization
- Image, font and script optimization with next/image, next/font
- Sanity-driven landing pages so marketers can ship without dev tickets
- Server-side GTM, Klaviyo + Meta CAPI deduplicated
- SEO migration plan with redirects and content audit to preserve rankings
Achievements
+41%
Site conversion rate
1.6s
Mobile LCP (was 4.2s)
+27%
Organic traffic (3 mo)
8 wk
From kickoff to launch
Services used in this engagement
Service
Next.js Development
Senior Next.js engineers shipping production apps and marketing sites — App Router, React Server Components, streaming, edge runtimes — engineered for speed, SEO and scale.
Explore
Service
Web Development
We build websites that load fast, rank well and convert hard — engineered by senior developers who understand SEO, tracking and conversion.
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Service
Shopify Development
We build Shopify stores that load fast, convert hard and scale to nine-figure GMV — from custom themes to headless Hydrogen.
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Deep dive
Read the full case study
Strategy, execution and what we improved end-to-end.
View case study
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