Since 2019
SHOPIFY PLUS FOCUS
Since 2019
SHOPIFY PLUS FOCUS
Plus storefronts, checkout extensions, and migrations for DTC and B2B brands.
Your partner for custom builds on Shopify Plus
We lift DTC revenue 12% to 28% with tested checkout and PDP work. From funded brands to 9-figure catalogs.
Shopify App Store developer
WE SHIP OUR OWN PRODUCTS
A live app on the Shopify App Store, not just client stores.
Clutch 5 star rating
VERIFIED CLIENT REVIEWS
Reviewed by the clients we shipped for. Read them on Clutch.
Shopify clients
Measured results
Proof of Shopify performance.
Shopify Plus builds · CRO experiments · Checkout conversion
01
20+
Shopify Plus builds shipped
Enterprise storefronts and custom checkout flows.
02
1,900+
CRO experiments run
Conversion tests across storefront and checkout.
03
+18%
Checkout conversion
CleanSkinClub
Shopify engineering
The Shopify work that gets expensive when it goes wrong.
We work where a relaunch, migration, or integration mistake immediately costs revenue. Our setups are built for complex catalogs, mature systems, and scaling teams.
Shopify agency services, Shopify development, Shopify Plus, headless Shopify, checkout extensions, CRO, A/B testing, accessibility compliance, and Shopify consultancy.
HOW WE WORK
Average client tenure: 30 months.
Most teams keep us after launch for optimization, experiments, and feature delivery. Fixed scope and price, agreed before we start. The work has to keep earning its place.
83% still active after 24 months
Measured across Shopify retainer and repeat project clients since 2019. No minimum term or lock-in.
You own everything from day one
Your repo, your accounts, your documentation. Written as we go, not assembled at handover.
What our customers say
“We're the #1 face towel on Amazon, but our Shopify offers were too slow and confusing. They rebuilt for speed, fixed our subscription flow, and our online revenue is now growing 18%.
We build on the Shopify apps you already trust.
We partner with best-in-class Shopify apps to extend your store with CRO, personalization, subscriptions, loyalty, and search experiences.
Engagement models
Two ways to work with us.
Ship your store · Keep improving it
01
Launch
Project build
From $15,000 USD
Fixed scope and price, agreed before we start. Plus builds, 6 to 8 weeks. Migrations, 3 to 6 months.
02
Weeklyreleases
Growth partner
From $3,500 per month USD
Ongoing development and a running A/B programme. We suggest three months so tests reach significance.
Let's meet
Looking to scale revenue on Shopify? You'll book directly with Dusan J., Founder at EXTFOX, to discuss your store, opportunities, and next steps.
Tell us about your store
Pick a time that works for you. You'll get instant confirmation and a calendar invite.
Prefer to call? (862) 259-6969
Not ready to book?
FAQ
We work with growth-focused DTC and B2B brands, from emerging labels to enterprise teams with complex Shopify Plus requirements. You are an especially strong fit if you are migrating from Adobe Commerce (Magento), WooCommerce, or a custom platform to Shopify Plus, or scaling an existing Shopify store with checkout, performance, or internationalization work.
We are a focused Shopify development studio, not a generalist agency spread across unrelated stacks. You work directly with senior builders who own delivery end to end. We combine deep Shopify Plus expertise with AI-assisted QA, CRO, and automation where it speeds launches without cutting quality. Clear ownership, direct communication, and no unnecessary layers.
A technical audit of your store, a scoped ticket backlog in GitLab you can see, and the first deploy to staging.
We work with both. The right plan depends on your revenue, checkout needs, markets, and integrations. Beyond a certain scale, Shopify Plus is usually the better fit for checkout extensions, B2B, and operational complexity. We will recommend what makes economic sense for your business, not what is easiest to sell.
Full overlap with UK and EU business hours, four hours with US East Coast, and same-day response on production issues.
You own the repo and accounts from day one. Handover notes are written as we go in GitLab, not assembled at the end. Every change goes through senior review and QA before it ships, so the codebase stays documented and transferable at any point.