Shopify Plus
One focus.
We design, engineer, and maintain commerce infrastructure for brands that have found product-market fit and are ready to scale. From conversion-focused UX to headless architecture on Hydrogen, our work spans the full spectrum of what Shopify Plus can do.
We work best with brands doing $5M-$100M+ in annual revenue. Brands that care about how their platform performs, not just how it looks. If you're building a category leader, we should talk.
14+
Years in ecommerce
210+
$1.5B+
UX architecture built around how your customers actually shop. Conversion-optimised layouts. Responsive design systems that look sharp on every device. Checkout flow engineering that reduces drop-off and increases average order value.
Advanced Engineering
Custom Shopify Plus builds, headless commerce on Hydrogen with Sanity and Algolia, complex third-party integrations, platform migrations from Magento, WooCommerce, and BigCommerce. Performance engineering that keeps your site fast under load.
Platform Partnerships
Ongoing retainers for feature development, integration maintenance, conversion testing, and strategic upgrades. Your platform evolves alongside your business. We stay close and keep things moving forward.
Some brands outgrow what a Shopify theme can do. Headless Shopify separates the storefront from the commerce engine, so you control speed, design and content while Shopify keeps running checkout, payments and orders.
As a Shopify Plus Partner, we build headless on Hydrogen, Oxygen, Sanity and Algolia for brands like Carwyn Cellars, Lo & Co Interiors, The Coffee Company and Projecta. Headless or theme, every build ships with structured product data so AI agents can find and buy from you.
See headless Shopify →
Digital by default.
Teams in Melbourne, Los Angeles and London, so senior people who know the platform are online when your business needs them.
+1 628 285 3722
la@flux.agency
London
+44 20 5176 6166
london@flux.agency
Head Office - Melbourne
+61 421 832 713
hello@flux.agency
press@flux.agency
Frequently Asked Questions
If you have more questions, we're happy to answer them - just reach out.
A Shopify Plus agency designs, builds, and maintains ecommerce platforms on Shopify Plus. This includes UX design, custom theme development, headless architecture, third-party integrations, platform migrations, and ongoing optimisation. At flux.agency, we cover the full lifecycle from discovery through to long-term partnership.
A Shopify Plus project with flux.agency typically ranges from $30,000 to $150,000+ depending on scope. A standard Shopify Plus theme build sits at the lower end. A headless build with custom integrations and complex product architecture sits at the upper end. We scope every project individually and provide a fixed-price proposal after discovery.
Most Shopify Plus builds take 3-6 months from discovery to launch. Timelines depend on project complexity, content readiness, and the number of third-party integrations involved. Migrations can be faster if the source platform data is well-structured.
If your revenue is approaching or above $4M a year, the lower transaction fees on Shopify Plus usually make it worthwhile. Plus also gives you multi-store management, checkout customisation through Shopify Functions and checkout extensions, native B2B, and catalogue syndication to AI shopping surfaces. We check fit during discovery and will tell you if standard Shopify is the better call.
Shopify Plus introduces complexity that standard agencies aren't equipped to handle. Custom checkout logic, headless architecture, multi-store internationalisation, and enterprise-grade integrations all require deep platform knowledge. flux.agency has worked exclusively on Shopify since 2012 and has delivered Shopify Plus projects for brands like 2XU, Quad Lock, Thankyou, and Cambridge Clothing.
Yes. Most of our client relationships extend well beyond launch through platform partnership retainers. These cover feature development, integration maintenance, performance monitoring, conversion testing, and strategic platform roadmapping. We structure retainers around sprint durations rather than fixed dollar amounts, giving you flexibility in how support hours are allocated.