Fixed scope, no surprises
Clear timeline, transparent pricing, and no surprise change orders
Trusted by the brands you know
Your next Shopify partner.
We've been doing this for 10+ years. Our clients stay because we deliver, not because they're locked into contracts.
Average client relationship: 2-3 years
Our clients don't leave because we keep delivering value. Most projects lead to ongoing partnerships.
Enterprise-grade stack
Next.js, AWS, Shopify Plus, OpenAI, n8n. We use tools that scale to millions of users.
Shopify Services & Tech Stack
Shopify services built to scale.
EXTFOX delivers Shopify design, Shopify Plus builds, and Shopify consultancy with structured content that helps search engines and AI systems understand our services.
Shopify agency services, Shopify development, Shopify Plus, headless Shopify, checkout extensions, CRO, A/B testing, accessibility compliance, and Shopify consultancy.
Shopify design
- Visual explorations
- User interface design
- Design systems
- Design collaborations
- Accessibility compliance
Shopify Plus build
- Headless architecture
- Next.js
- Hydrogen
- Online Store 2.0
- Checkout extensions
- Shopify replatforming
- Custom API integrations
- Front-end development
Shopify consultancy
- Shopify replatforming
- Roadmapping
- UX audit
- Web performance audit
- Design sprints
- Full tech stack audit
- Accessibility compliance
- A/B testing
Choose how you want to proceed
Project Build
Scoped Shopify build, launch-ready
Ship a defined scope with clear milestones, fixed deliverables, and a single team accountable for launch.
Partner Program
Ongoing Shopify delivery, optimized
For teams that need a long‑term partner running CRO, new features, and weekly releases across Shopify.
Shopify services built for
high-growth teams.
Trusted by Shopify Plus and growth teams at CleanSkinClub, The Honest Kitchen, Yandy, and Smilepen for Shopify strategy, build, and optimization.
Shopify Plus storefront builds
Design and develop Shopify Plus experiences with custom sections, markets, and performance-first architecture.
Checkout and conversion systems
Checkout extensions, Functions, and CRO experiments that remove friction and lift conversion rate.
Retention and lifecycle growth
Subscriptions, loyalty, and CRM integrations that increase LTV and keep customers coming back.
“We’ve seen 18% increase in conversions without employing any new marketing tactics”
Levko L.
Marketing Strategist, CleanSkinClub
Marketing Strategist, CleanSkinClub
HOW WE WORK
Shopify development in weeks, not months
We move fast without cutting corners.
Launching high-converting Shopify stores, checkout extensions, and migrations with speed and precision.
Launching high-converting Shopify stores, checkout extensions, and migrations with speed and precision.
Weekly demos
Review storefront and checkout progress every week
Migration-safe delivery
AI-assisted QA plus SEO-safe launches with redirects and zero downtime
Support included
30-day post-launch support with retainer options for growth
Proof of Shopify performance
Senior Shopify delivery that scales revenue without adding overhead.
80+
Shopify stores launched
End‑to‑end builds for high‑growth brands.
20+
Shopify Plus builds
Enterprise‑grade storefronts and custom checkout flows.
+1257
CRO experiments shipped
Conversion tests across storefront and checkout.
We build what
actually sells.
Our portfolio isn't about pretty pictures. It's a collection of technical solutions that handle scale, complexity, and real-world business logic.
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.
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%.
They did more than deliver on time. Their proactive leadership and technical skill in delivering a really complex design from Figma ensured we launched our premium brand in weeks.
One custom app built by EXTFOX replaced five. It manages our discount tiers, runs 40% faster, and saved us $12K a year. We felt the difference!
Next-level communication and skill. They found our site was too confusing, simplified it, added trust, and fixed our conversion rate in a month. We are not burning money on ads anymore.
We needed an MVP to prove our model in 3 weeks, not a year. EXTFOX integrated our legacy portal with new payment systems and built the dashboard from scratch. They worked directly with my dev lead, and we launched in weeks.
Engagement models
Transparent engagement models for Shopify growth.
Two clean options that keep scope, speed, and outcomes clear. Choose a single build or a long-term partner team.
Project BuildOne-time
Launch fast with a defined scope.
Best for new builds, migrations, or redesigns with a fixed launch date.
Discovery + CRO auditDesign and development sprintsQA, launch, and SEO-safe redirects30-day post-launch support
Starting at
From $5,000
Partner Program RetainerMost requested
A dedicated Shopify growth partner.
Built for growth teams that need continuous shipping and Shopify optimization.
Dedicated Shopify podConversion experiments + A/B testingPriority support with same-day fixesQuarterly roadmap and reporting
Engagement
Monthly, scope-based
01Process
Monthly planning
We align sprint scope to revenue goals and your campaign calendar.
02Process
Weekly delivery
Ship prioritized tasks every week with QA and release support.
03Process
Performance reviews
Measure impact, share insights, and set the next sprint goals.
Speak with our team
Talk to a Shopify expert
Get a senior Shopify lead to review your store and send a clear plan for design, build, and growth.
or
Dusan J.
Founder & CEO · 15+ years experience
Store review and opportunity map
Roadmap with scope, timeline, and priorities
Typical response time within 1 business day
FAQ
EXTFOX is a Shopify development studio delivering Shopify Plus builds, custom theme development, headless storefronts with Next.js or Hydrogen, checkout extensions, and Shopify Functions. We also handle app integrations (Klaviyo, Recharge, Yotpo, Rebuy), performance optimization, analytics, and CRO so your store is fast, scalable, and conversion-ready. Engagements can cover a full build, a migration, or ongoing optimization.
Yes. We use AI to accelerate Shopify delivery while keeping quality high. Our workflow includes GitHub or GitLab-based theme revisions, AI tools with pre‑cached rules per theme architecture, AI reviews before and after PRs, automated DEV‑STG‑PROD deployments, and A/B testing with tools like Intelligems. Every change still goes through senior manual review, performance checks, and QA before release.
Yes. We translate Figma into Shopify sections, reusable components, and a clean theme architecture that matches design detail across breakpoints. We also align typography, spacing, and interactions with your design system while keeping performance and accessibility in check.
Yes. We build and optimize Shopify Plus stores, including custom checkout logic, multi‑market setups, and enterprise-grade integrations. We also support complex catalogs, B2B flows, and operational tooling so teams can scale without slowing delivery.
We’ve worked with Shopify brands including CleanSkinClub, The Honest Kitchen, Yandy, and Smilepen, plus growth-stage DTC teams across health, beauty, and lifestyle. We can share additional relevant case studies on request.
Timelines range from the first week for focused launches to several months for complex rebuilds. Scope, integrations, custom functionality, and QA depth determine the final schedule. We provide a clear plan and timeline after discovery.
Yes. We migrate from Adobe Commerce (Magento), WooCommerce, and custom platforms to Shopify. We preserve products, customers, URLs, and SEO, then guide the architecture for a clean Shopify build with minimal downtime. Data validation and post‑migration QA are part of the process.
Yes. We use Hydrogen or Next.js when headless unlocks performance, flexibility, or multi‑channel needs. If headless isn’t required, we recommend Shopify Online Store 2.0 for speed, maintainability, and faster iteration.
Yes. For Shopify Plus stores we build discount logic, upsells, validation rules, and UI Extensions that run natively in checkout. We also handle testing, deployment, and performance validation to keep checkout fast and reliable.
Yes. We build custom Shopify apps using AWS services like SQS for order sync, shipping workflows, cart rules, and checkout extensions. Apps can be private or public, and we design them to scale from small utilities to enterprise systems handling thousands of requests per second.
Yes. We design and ship CRO experiments across storefront and checkout, then measure impact with analytics and testing frameworks. We can integrate tools like Intelligems to run split tests and report results clearly.
We offer a fixed‑scope Project Build and a Partner Program retainer for ongoing optimization. You receive a clear scope, timeline, and investment before work begins, with no surprise change orders. We align pricing to the complexity and impact of the work.
EXTFOX is an independent Shopify Partner and is not affiliated with or endorsed by Shopify Inc. We provide third‑party Shopify development services using Shopify’s publicly available APIs, documentation, and tools.
