Define the vision
We clarify business goals, user flow upfront to move you closer
We've just launched EmbedFAQ - check it out here
AI. COMMERCE. PRODUCT ENGINEERING.
EXTFOX is a global technology partner for Shopify Plus, SaaS, and AI-driven commerce brands.
MVP & SaaS platforms
From concept to product in weeks
We design and ship investor-ready MVPs and full SaaS platforms using Next.js, Remix, and AWS - built to validate fast and scale efficiently.
AI voice & chat systems
Automate conversations that convert
Deploy custom AI chatbots and voice agents that engage customers, reduce support time, and connect seamlessly to your Shopify, CRM, or backend via RAG or custom APIs.
Full-stack development
End-to-end software solutions
We build complete web applications from frontend to backend - scalable architecture, third-party integrations, and custom APIs that power your entire business workflow.
Shopify development
Custom storefronts built for scale
We develop and optimize Shopify Plus stores that grow with your brand - from fast-loading themes to advanced subscription systems and bespoke app integrations.
MVP & SaaS platforms
From concept to product in weeks
We design and ship investor-ready MVPs and full SaaS platforms using Next.js, Remix, and AWS - built to validate fast and scale efficiently.
AI voice & chat systems
Automate conversations that convert
Deploy custom AI chatbots and voice agents that engage customers, reduce support time, and connect seamlessly to your Shopify, CRM, or backend via RAG or custom APIs.
Full-stack development
End-to-end software solutions
We build complete web applications from frontend to backend - scalable architecture, third-party integrations, and custom APIs that power your entire business workflow.
MVP & product development
From vision to market in 8 weeks
We focus on building the core features that validate your business idea and attract early adopters. No bloat, just a functional, fundable product built with a scalable tech stack from day one.
A Message From Our Founder
"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."
-Dusan J.
Founder & CEO, EXTFOX
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.
Build faster. Scale smarter. Control costs.
Your new technical team
We become your dedicated product team, from initial build to enterprise scale. Our senior engineers work alongside you to architect, build, and optimize the systems that power your growth.
Next.js
React
Angular
TypeScript
Python
Node.js
Shopify
OpenAI
n8n
PostgreSQL
GraphQL
AWS
Docker
Tailwind CSS
Kubernetes
GitHub Actions
Figma
MongoDB
Firebase
VercelFull-cycle product development
We handle everything from initial architecture to ongoing optimization. No handoffs, no silos - just one team focused on your success.
AI built into your core product
We don't just add AI features; we design products where intelligence is fundamental to the user experience and business value.
HOW WE WORK
MVP in weeks, not months
We move fast without cutting corners.
Bringing your MVP or SaaS product to life with unmatched speed and quality.
Bringing your MVP or SaaS product to life with unmatched speed and quality.
Design for scale, not stress
Using AI-assisted architecture, we create secure, modular stacks
AI-accelerated development
We code, review, and optimize with latest LLMs to reduce friction, boost velocity
Test + Launch
Automated QA meets human testing for fast feedback and stable releases that performs
We can help you with
01Shopify commerce
02AI & automation
03Product development
What our customers say
Most agencies would have told us to use five different apps. EXTFOX built us a single custom application that handles our global tax compliance and regional inventory pooling. It replaced a $12,000/year SaaS stack and runs 40% faster.
We're the #1 face towel on Amazon, but our Shopify store was an embarrassment. It was slow, clunky, and didn't reflect our brand. They rebuilt our theme for speed, streamlined our subscription flow. Our online revenue is now growing 30%.
They didn't just build a store; they built a robust Shopify site for our subscription business. Their proactive leadership and technical skill in delivering a pixel-perfect design from Figma ensured we launched a premium, seamless customer experience.
We were burning $5k/month on ads with a 1.2% conversion rate. They found our cart was confusing users with too many upsell popups. They simplified the flow, added trust badges, and within a month, our CTR settled.
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 clinician dashboard from scratch. They worked directly with my dev lead, and we launched in weeks.
Power your growth where it matters most
For founders, product teams, and marketing leaders who need to move faster.
From high-growth storefronts to AI-native SaaS products, we specialize in the technology that drives revenue: faster launches, scalable architecture, and intelligent features that convert.
Shopify that scales with your success
We build commerce engines, not just storefronts. From high-converting Shopify Plus migrations to complex subscription systems, we focus on architecture that converts and scales-proven with brands like Smilepen and The Honest Kitchen.
AI that actually works in production
We move AI from demo to daily operation. Implement RAG search that understands customer intent, AI agents that handle 40% of support queries, and automation that eliminates manual work. Real intelligence, measurable ROI.
Products built to scale
We’re your technical co-founders for ambitious software. From 8-week MVP sprints to enterprise SaaS platforms, we combine lean methodology with robust architecture. Launch, validate, and scale without technical debt.
FAQ
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, SmilePen, 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.
FOR FOUNDERS WHO SHIP
We build on the platforms
you trust.
We skip the partnership slides and focus on what matters: working software that solves real business problems.
Service partners
We collaborate with specialized teams to expand capacity without compromising quality.
Technology partners
Built on a stack designed for growth: Shopify Plus, modern APIs, and scalable AI infrastructure.
80+ products developed
Proven results in commerce and AI
*Average 28% revenue lift for clients
AI that converts
Implementing intelligent automation that lifts revenue by 15-40%
From MVP to scale
Architecting SaaS platforms for rapid launch and long-term growth