We're Kartlyx — your ecommerce design and development partner. We create custom Shopify experiences for DTC brands, growing retailers and Shopify Plus merchants, connecting conversion-focused design with maintainable technology.
Faster pages, premium mobile design and product pages that build trust, for Shopify brands across the US, UK and Europe.
From brand strategy and identity to checkout and post-purchase flows — we craft the full ecommerce experience. One partner, one vision, one team shipping everything your store needs to scale from launch day to Shopify Plus.
A full-stack agency offering — strategy, design, Shopify / Shopify Plus development, custom apps, and the growth support that keeps your store scaling.
Customer research, competitive mapping, and brand architecture so every pixel has a purpose.
Custom Shopify storefronts designed in Figma and developed in Liquid with maintainability and performance in mind.
Enterprise-grade builds for high-volume brands — Shopify Functions, Flow, checkout extensions and B2B.
High-converting product & campaign pages backed by funnel psychology and real A/B tests.
Logos, typography systems, color, and packaging — the full visual identity your store deserves.
From naming to launch day — strategy, identity, store build, copy, photography, and paid-ready assets.
Your store is where shoppers decide if you're worth their money. We take what makes your brand irreplaceable, shape the entire Shopify experience around it, and make sure they feel it before they scroll another pixel.
Hear it straight from the founders — real, unscripted words on what it was like building their Shopify stores with us.
Choose ongoing support around the work your store needs. We also take on individual projects, including Shopify and Shopify Plus builds, migrations, speed optimization and custom apps.
Explore our Shopify store development, Shopify Plus development, Shopify migration and conversion rate optimization services.
What’s included:
For ecommerce teams that need regular store updates and technical support.
Discuss your requirementsEverything in Core, plus:
For marketing teams with a regular schedule of launches, promotions and new pages.
Discuss your requirementsEverything in Velocity, plus:
For brands that need to understand why shoppers leave and improve the path to checkout.
Discuss your requirementsWe welcome projects from brands in the United States, Canada, the United Kingdom and Australia, as well as Germany, the Netherlands, Sweden, Norway and Denmark. Explore how we work internationally.
Explore our Shopify portfolio, how we work and our buyer guides before planning your next project.
Practical answers before your next Shopify project.
Discuss your projectA Shopify development agency plans, designs and implements storefronts and integrations. Kartlyx brings together ecommerce strategy, custom themes, Shopify Plus development, migrations and ongoing optimization.
We welcome projects from brands in the United States, Canada, the United Kingdom, Australia, Germany, the Netherlands, Sweden, Norway and Denmark. Working hours, communication and market requirements are agreed during discovery.
The investment depends on design requirements, templates, integrations, content and migration complexity. Share your current store, priorities and target launch window so we can define an appropriate scope.
We review the current customer journey and technical foundation, agree priorities, then plan design, development, testing and launch. Existing URLs, integrations and measurement need consideration throughout.
Planning a Shopify build, migration or redesign? Share your current store, business priorities and target launch window so we can discuss the right scope.
Prefer email? Contact our team directly.
LET’S TALK ABOUT YOUR STORE
Choose a time for a 30-minute conversation about your store, goals and next steps.
Prefer a separate tab? Open our booking calendar ↗
