Clear scope and pricing
Fixed projects or monthly retainers, priced upfront
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Shopify, AI & Product Development
EXTFOX is a development partner for Shopify Plus, SaaS, and AI-driven commerce brands.
Our Services
Themes, apps, checkout extensions
Shopify development
Custom Shopify Plus stores, theme development, subscription systems, and checkout customization for high-growth brands.
Chatbots, voice agents, workflows
AI & automation
AI-powered customer support, RAG search systems, voice agents, and workflow automation that reduce costs and scale operations.
MVPs, SaaS platforms, full-stack apps
Product development
From 4 to 8 week MVP sprints to enterprise SaaS platforms. Next.js, React, Node.js, Angular, AWS architecture built to scale.
Themes, apps, checkout extensions
Shopify development
Custom Shopify Plus stores, theme development, subscription systems, and checkout customization for high-growth brands.
Chatbots, voice agents, workflows
AI & automation
AI-powered customer support, RAG search systems, voice agents, and workflow automation that reduce costs and scale operations.
MVPs, SaaS platforms, full-stack apps
Product development
From 4 to 8 week MVP sprints to enterprise SaaS platforms. Next.js, React, Node.js, Angular, AWS architecture built to scale.
Themes, apps, checkout extensions
Shopify development
Custom Shopify Plus stores, theme development, subscription systems, and checkout customization for high-growth brands.
We can help you with
01
Shopify developmentCustom stores, themes, checkout extensions, and subscription systems for Shopify Plus brands.
02
AI & automationAI chatbots, voice agents, RAG search systems, and workflow automation that scale operations.
03
Product developmentMVP sprints, SaaS platforms, and full-stack applications with Next.js, React, and Node.js.
HOW WE BUILD
Senior engineers. Modern stack.
Shopify, Next.js, AWS, OpenAI, and the tools your product needs. One team from architecture to launch.
Shopify
Next.js
Node.js
GraphQL
Angular
n8n
OpenAI
AWS
Python
React
TypeScript
PostgreSQL
Docker
Tailwind
Kubernetes
GitHub
Figma
MongoDB
Firebase
VercelFull-cycle delivery
Architecture, build, and optimization without handoffs between teams.
Commerce and AI
Shopify Plus, automation, and AI systems built for production, not demos.
HOW WE WORK
Ship in weeks, stay for years
Scoped projects when you need them.
Retainers when you want a team on call.
Retainers when you want a team on call.
Daily demos
You see progress every day, not just at the end
On-time delivery
We've shipped 80+ projects on schedule
Support included
30-day post-launch support, retainer options for ongoing work
From the founder
A message from
our founder.
EXTFOX · Founder letter · Est. 2016
Photo · EXTFOX Studio
Dusan Jovanovski
Skopje, MK
On partnership
“Strong partnerships are built on dependability. I understand how frustrating it is when freelance partners jump to the next project and leave clients behind. We don't do that. We stay committed and right there with you when it matters most.
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%.
Power your growth where it matters most
For founders and product teams who need to ship faster.
Real outcomes from real projects.
Commerce that converts
Shopify Plus stores, checkout, and subscriptions built to grow revenue. Trusted by CleanSkinClub, Smilepen, and The Honest Kitchen.
AI that ships
Support agents and automation running in production, not slide decks.
Products built to scale
MVPs in 4 to 8 weeks and SaaS platforms with architecture that lasts.
Trusted by the brands you know
Your long-term partner.
10+ years building commerce, SaaS, and AI products. 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.
Projects and retainers
Fixed-scope projects when you need a clear deliverable. Monthly retainers when you want a dedicated team on call.
The record
Proof, not promises.
EXTFOX · Performance ledger · Est. 2016
01
80+
Products developed
Proven results in Shopify and SaaS development
View our work02
15–40%
AI that converts
Intelligent automation engineered to lift revenue
03
4–8weeks
Product development
MVPs shipped on schedule. SaaS platforms built for long-term growth
Let's meet
Dusan J. Founder @ EXTFOX.com | Custom Shopify Plus development, AI commerce systems, and product MVPs for DTC brands
Tell us about your project
Pick a time that works for you. You'll get instant confirmation and a calendar invite.
Prefer to call? (862) 259-6969
Frequently Asked Questions
We specialize in three core areas: building custom SaaS platforms from MVP to enterprise scale, developing intelligent AI systems including RAG pipelines and autonomous agents, and creating high-conversion Shopify Plus solutions with advanced customization.
We're painfully honest about what works. Most agencies say yes to everything. We say "prove it" to bad ideas. We'll challenge your assumptions because your success matters more than our comfort. While other teams hide behind Jira tickets, we're thinking about your customers' experience. We lose sleep over micro-interactions. We fight for simpler solutions that actually get used. We care more than we should, and it shows in everything we build.
We partner with global DTC brands, enterprise companies, and funded startups. Our clients include Clean Skin Club, Prayer Tree, The Honest Kitchen, SR Bank and emerging SaaS companies across healthcare, ecommerce, and technology sectors.
Clients typically achieve faster product launch cycles, improved conversion rates through AI-powered optimization, significant automation of manual processes, and scalable systems designed for long-term growth with minimal technical debt.
Share your project goals through our link. We'll review your needs and schedule a discovery call to understand your requirements. Based on that, we'll provide a detailed technical plan, timeline, and investment estimate before project kickoff.