Commerce Infrastructure

You've invested in a best-of-breed tech stack. Who's making sure it actually works together? for brands that take commerce seriously.
Not just today. At 3 AM. During your biggest sale. When the ERP throws an error and your inventory goes to zero on a product that's in stock.
Talk to Our Infrastructure Team →
Man sitting on a wooden stool wearing a blue shirt and cap, levitating a purple jacket with his hands against a pink background.
Close-up of a mustard yellow upholstered bed headboard with two off-white pillows and part of a wooden bedside table.
The evolution of commerce tech. And the gap nobody talks about.
You started with an all-in-one platform. It did everything. Badly, but predictably. Then you upgraded to best-of-breed - dedicated tools for commerce, CMS, search, email, analytics, ERP, fulfillment. But nobody told you that means 12 systems that need to talk to each other. So you added middleware. Zapier. Custom webhooks. The plumbing works - most of the time. But who monitors the connections? Who notices when Algolia stops syncing at 2 AM? Who catches the ERP integration silently dropping orders for three days? That's what we do.

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.
‍
About us→

10+

Years in commerce

6+

Systems integrated per client

$1.5B+

In client revenue
Man wearing sunglasses, a beige jacket, and white shirt standing on a city street holding a car key remote.
Bottle of Starward Stout Cask whiskey, a glass with whiskey, and a beer glass overflowing with foamy stout surrounded by roasted coffee beans.
We don't just build your stack. We make it work.
Architecture, build, and operate. Three layers of commerce infrastructure support.
‍
‍
Architecture We design how your systems connect - APIs, webhooks, data flows, fallback logic. Not "plug A into B" but "here's what happens when B goes down at 3 AM."

Build
‍
Fixed-price implementation. Hydrogen + Sanity + Algolia as the core. Your ERP, OMS, email, analytics, and payments connected through clean, documented integrations. Operate Ongoing async retainer. Weekly sprints. We monitor, maintain, and evolve your stack as your business grows. New channel? New market? New integration? It goes into the sprint queue.

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.
‍
‍
View all Services→
Handee Paper Towel

MiGoals

Shopify Commerce for a Goal-Setting Brand
UI/UX Design & Shopify Development
Handee Paper Towel

Lo & Co

Headless Shopify Plus, +175% orders YoY
Strategy, UI/UX Design & Headless Engineering on Shopify Plus.
You're our kind of brand if...Built for people and AI agents.
You're doing $5M-$100M+ in annual ecommerce revenue. You've outgrown your monolith or your current agency. You have 6+ systems that need to work together. You care about uptime during peak traffic. You want a team that understands commerce operations, not just frontend pixels. You're tired of "it works on my machine" as a support response.

Our headless stack runs on Hydrogen , Sanity , and Algolia . This combination delivers sub-second page loads, total design freedom, and a content workflow that marketing teams can actually use without developer support.

We've delivered headless builds for brands like Carwyn Cellars, Lo & Co Interiors, Coffee Company, and Projecta. Each project required a different approach to content architecture, product discovery, and checkout integration. The stack stayed the same. The implementation was bespoke every time.
‍
‍
See our Services→
Woman sitting on wooden floor wearing a beige faux fur jacket and brown leather boots, with long black hair and leg tattoos.
Two pink notebooks with one labeled GOAL DIGGER, a black pen, and a wooden tray holding a cup of green tea, a tube of Aesop hand cream, and white wireless earbuds case on a beige cloth.
Async. Global. Predictable.

We're a distributed team across Melbourne, Los Angeles and London, and that's an operational advantage. Your commerce stack is monitored across time zones. Sprint kickoffs happen Tuesday. Deliveries happen Friday via Loom. You review Monday and Tuesday. No meetings for the sake of meetings, and no waiting for your agency to wake up.

Teams in Melbourne, Los Angeles and London, so senior people who know the platform are online when your business needs them.

Los Angeles
+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

‍‍
Work with us→
Projecta Jump starter next to a tyre

Vitadrop

Shopify Commerce for Functional Hydration
UI/UX Design & Shopify Development
Projecta Jump starter next to a tyre

2XU

Global Shopify Plus Commerce Platform Rebuild
UX Architecture, Shopify Plus Engineering & Platform Partnership

Frequently Asked Questions

If you have more questions, we're happy to answer them - just reach out.

Contact
What does commerce infrastructure actually mean?

It means designing how your systems connect, building those connections properly, and operating them over time. Architecture, build, operate. Most agencies stop at the build. We stay for the operate.

How is this different from middleware or an iPaaS?

Middleware connects pipes. We make sure the water flows. An iPaaS solves the plumbing problem, but it doesn't monitor whether your integrations are actually working correctly, or catch it when data stops syncing at 2 AM. We provide the intelligent operations layer on top.

What tech stack do you build on?

Hydrogen + Sanity + Algolia as the core commerce stack. Your ERP, OMS, email, analytics, and payments connected through clean, documented integrations. We've validated this stack as the most future-proof for $5M-$100M+ commerce brands.

What size brands do you work with?

Brands doing $5M-$100M+ in annual ecommerce revenue. Typically you've outgrown your first platform or your first agency. You have enough systems that integration complexity is real, and enough traffic that downtime costs real money.

How does the ongoing retainer work?

Async weekly sprints. Tuesday kickoff - scope locked. Friday delivery via Loom. Monday-Tuesday you review and give feedback. Your project manager holds the scope gate. No standing meetings. No status calls. Actual work.

Where are you based?

Melbourne, Los Angeles, and London. Distributed by design. Your commerce stack is monitored across time zones. There's always someone working - no waiting for your agency to wake up.