Swimwear World: a swimwear store, rebuilt fast on Shopify
A long-standing client moved to Shopify; we built a new store on a custom theme and support it, keeping Core Web Vitals in the green for real users.
SummaryA women's swimwear Shopify store rebuilt on a custom theme; Core Web Vitals passing for real users (LCP 1.8s, INP 169ms, CLS 0).
Swimwear World is a Shopify store for women's swimwear: swimsuits, dresses and cover-ups for the swim season, plus swim accessories (bags, jewellery, hats). A long-standing WEB4PRO client, the brand moved to Shopify; we built a new store on a custom theme and have supported it since, keeping performance and Core Web Vitals in the green for real users.
- Built a new Shopify store on a custom theme
- Image optimisation: WebP/AVIF, correct sizing, responsive srcset, lazy loading
- Full technical audit: Lighthouse/PageSpeed, Core Web Vitals, apps, scripts, theme code
- Font optimisation: preconnect/preload, font-display, subsetting
- App audit & cleanup: kept only what's needed, removed leftover/ghost code
- Preloaded the LCP hero to bring Largest Contentful Paint down
- Liquid refactoring: leaner templates, reduced DOM & render overhead
- Reduced third-party/analytics script impact
- Removed render-blocking CSS/JS; deferred non-critical scripts
- Reserved space for media to keep layout shift (CLS) near zero
- Inlined critical CSS for the first screen
- Ongoing performance support & monitoring
All three Core Web Vitals are in the green for real users. Mobile lab "Performance" scores fluctuate run to run and depend on third-party scripts.
"We rebuilt Swimwear World on Shopify with speed built in, and keep it in the green through ongoing support."