DField SolutionsMérnöki stúdió · Budapest
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CASE STUDIES · ecommerce

Shopify Theme → Hydrogen migration · +41% mobile conversion, LCP 3.8s → 0.7s

Migrated a Hungarian DTC brand from a Shopify liquid theme to Hydrogen (React/Remix). Mobile conversion +41%, LCP down to 0.7s, first-week bug rate under 0.3%.

Timeline7 weeks
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Reviewed by
01 / Mobile conversion+41% (month 1).
02 / LCP3.8s → 0.7s (p75 on 4G).
03 / Search relevance on Hungarian queries+68% (A/B vs legacy).
04 / First-week post-launch bug rate0.3% of sessions.
The problem01 / 03
  • 01Shopify liquid theme maxed out on customisation · the design team kept bumping into walls.
  • 02Mobile LCP was 3.8s on 4G · rural shoppers bounced.
  • 03Internal search was slow, fuzzy, and couldn't handle Hungarian diacritics.
  • 04Klaviyo integration for abandoned cart was breaking every time the theme was touched.
The solution02 / 03
  • 01Hydrogen storefront on Remix · served by Shopify Oxygen (edge).
  • 02Algolia search with Hungarian ICU analyzer · typo-tolerant + diacritic-folded.
  • 03Klaviyo via webhook → edge function · no more theme coupling.
  • 04Product-image pipeline: AVIF + sized variants + aspect-ratio discipline.
The outcome03 / 03
  • 01Mobile conversion: +41% (month 1).
  • 02LCP: 3.8s → 0.7s (p75 on 4G).
  • 03Search relevance on Hungarian queries: +68% (A/B vs legacy).
  • 04First-week post-launch bug rate: 0.3% of sessions.
  • 05+22% organic traffic from mobile search after 3 months.
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