Bespoke themes, performance engineering, and conversion-led UX for high-growth brands.
- Custom theme & components
- Core Web Vitals work
- Accessibility baseline
Custom development, migrations, checkout, headless, integrations, automation, CRO, and international — shipped by a certified Shopify Plus Partner working with brands across 12+ countries.

Every service has a dedicated page with deliverables, process, and a How-To section — the work, not a brochure.
Bespoke themes, performance engineering, and conversion-led UX for high-growth brands.
Move from Magento, WooCommerce, BigCommerce, or custom systems with full data parity and SEO preservation.
Custom checkout flows on Functions and UI extensions — upgrade-safe, PCI-safe, performant.
Hydrogen, Oxygen, or custom React frontends for brands that need full control over UX and performance.
Connect Shopify Plus to SAP, NetSuite, Salesforce, HubSpot, Sales Layer, or custom systems with reliable sync.
Inventory, fulfilment, fraud, segmentation, and B2B approvals automated with documented Flow workflows.
Research-led audits, speed work, funnel improvements, and structured A/B testing for measurable lift.
Shopify Markets, multi-currency, localised content, tax, and hreflang done right — on a single Plus stack.
The patterns differ per industry — merchandising rules, compliance, subscription models, catalog depth. We've shipped in all five.
Complex pricing tiers, vendor portals, and bulk ordering.
Visual merchandising, size guides, and lookbooks.
Subscription models, ingredient transparency, and compliance.
Personalisation, gift wrapping, and high-value checkout.
50,000+ SKU management, PIM integration, and smart search.
The same sequence on every engagement, refined across enterprise Shopify Plus projects.
Map business goals, technical reality, and constraints — in writing.
System design and integration mapping for a scalable, maintainable stack.
Agile build with weekly demos and a staging environment from day one.
Cross-browser, accessibility, performance, and integration QA — automated where possible.
Controlled cutover with hypercare and an ongoing engineering retainer.
Useful next stops — on this site and on mejix.com.
Common questions about our Shopify Plus services.
Let's discuss your project and see how Mejix can help you scale.
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