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·7 weeks
Industry: ecommerceWebsite & online shop

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%.

THE PROBLEM

[1/3]

  • 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 SOLUTION

[2/3]

  • Hydrogen storefront on Remix · served by Shopify Oxygen (edge).
  • Algolia search with Hungarian ICU analyzer · typo-tolerant + diacritic-folded.
  • Klaviyo via webhook → edge function · no more theme coupling.
  • Product-image pipeline: AVIF + sized variants + aspect-ratio discipline.

Technologies

Shopify HydrogenRemixNext.jsAlgoliaKlaviyo

THE OUTCOME

[3/3]

  • 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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