--- title: "Shopify Plus Services — Development, Migration, Headless | Mejix" description: "Full-spectrum Shopify Plus services from a certified Plus Tier partner: custom development, migrations, Checkout Extensibility, headless, ERP integration, Flow, CRO, and international setup." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "ItemList", "name": "Shopify Plus Services by Mejix", "itemListElement": [ { "@type": "ListItem", "position": 1, "url": "https://mejixshop.com/services/shopify-plus-development", "name": "Custom Shopify Plus Design & Development" }, { "@type": "ListItem", "position": 2, "url": "https://mejixshop.com/services/shopify-plus-migration", "name": "Shopify Plus Migration Services" }, { "@type": "ListItem", "position": 3, "url": "https://mejixshop.com/services/checkout-extensibility", "name": "Checkout Extensibility and Scripts" }, { "@type": "ListItem", "position": 4, "url": "https://mejixshop.com/services/headless-commerce", "name": "Headless Commerce Development" }, { "@type": "ListItem", "position": 5, "url": "https://mejixshop.com/services/erp-crm-integration", "name": "Shopify Plus ERP & CRM Integration" }, { "@type": "ListItem", "position": 6, "url": "https://mejixshop.com/services/shopify-flow-automation", "name": "Shopify Flow Automation Setup" }, { "@type": "ListItem", "position": 7, "url": "https://mejixshop.com/services/shopify-plus-cro", "name": "Conversion Rate Optimization" }, { "@type": "ListItem", "position": 8, "url": "https://mejixshop.com/services/international-shopify-plus", "name": "International Shopify Plus Setup" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How long does a typical Shopify Plus migration take?", "acceptedAnswer": { "@type": "Answer", "text": "Most enterprise migrations run 12–20 weeks end-to-end. Catalog depth, integration count, and subscription / B2B complexity are the biggest variables." } }, { "@type": "Question", "name": "What's the difference between Shopify and Shopify Plus?", "acceptedAnswer": { "@type": "Answer", "text": "Shopify Plus is the enterprise tier — Checkout Extensibility, Functions, B2B, Markets, Shopify Flow, multi-store, and higher API limits. It's the right plan for brands at $1M+ ARR or with complex operational needs." } }, { "@type": "Question", "name": "Can you integrate Shopify Plus with our existing ERP, CRM, or PIM?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We've integrated Shopify Plus with Sales Layer PIM, SAP, NetSuite, Salesforce, HubSpot, and custom in-house systems, with real-time sync, reconciliation jobs, and a runbook for operations." } }, { "@type": "Question", "name": "Do you offer ongoing support after launch?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Most clients move into a continuous engineering retainer covering CRO, integrations, Plus feature adoption, and quarterly performance reviews." } }, { "@type": "Question", "name": "What industries do you specialise in?", "acceptedAnswer": { "@type": "Answer", "text": "B2B / wholesale, fashion, health & beauty, jewelry, and large-catalog retail — across 12+ countries." } }, { "@type": "Question", "name": "Do you support headless commerce on Shopify Plus?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Hydrogen + Oxygen, Next.js, or Remix on the Storefront API. We help decide whether headless is actually the right call before recommending it." } } ], "url": "https://mejixshop.com/services" } ] --- [Mejix Shopify Plus ](/) [Home](/)[Services](/services)[Case Studies](/case-studies)[Blog](/blog) [Request a Strategy Call](https://www.mejix.com/contact/) [Request a Strategy Call](https://www.mejix.com/contact/) Services # Shopify Plus engineering, end to end. Custom development, migrations, checkout, headless, integrations, automation, CRO, and international — shipped by a certified Shopify Plus Partner working with brands across 12+ countries. [Request a Strategy Call](https://www.mejix.com/contact/)[Explore the services](#services) ![Layered translucent panels representing the Shopify Plus services Mejix delivers](/assets/services-hero-BaMdxl-f.jpg) Plus Tier Certified Shopify Plus Partner 12+ Countries served Since 2022 Active Shopify partner EN · FR · HE Languages we work in The eight services ## What we ship Every service has a dedicated page with deliverables, process, and a How-To section — the work, not a brochure. ## [Custom Shopify Plus Design & Development](/services/shopify-plus-development) Bespoke themes, performance engineering, and conversion-led UX for high-growth brands. - Custom theme & components - Core Web Vitals work - Accessibility baseline [Learn more](/services/shopify-plus-development) [Request a call](https://www.mejix.com/contact/) ## [Shopify Plus Migration Services](/services/shopify-plus-migration) Move from Magento, WooCommerce, BigCommerce, or custom systems with full data parity and SEO preservation. - Magento / Woo / BigCommerce - 301 redirect map - Parallel-run cutover [Learn more](/services/shopify-plus-migration) [Request a call](https://www.mejix.com/contact/) ## [Checkout Extensibility and Scripts](/services/checkout-extensibility) Custom checkout flows on Functions and UI extensions — upgrade-safe, PCI-safe, performant. - Discount & cart Functions - Payment customisation - Scripts → Functions migration [Learn more](/services/checkout-extensibility) [Request a call](https://www.mejix.com/contact/) ## [Headless Commerce Development](/services/headless-commerce) Hydrogen, Oxygen, or custom React frontends for brands that need full control over UX and performance. - Hydrogen + Oxygen - Next.js / Remix - CMS-driven content [Learn more](/services/headless-commerce) [Request a call](https://www.mejix.com/contact/) ## [Shopify Plus ERP & CRM Integration](/services/erp-crm-integration) Connect Shopify Plus to SAP, NetSuite, Salesforce, HubSpot, Sales Layer, or custom systems with reliable sync. - Real-time event sync - PIM integration - Observability & runbook [Learn more](/services/erp-crm-integration) [Request a call](https://www.mejix.com/contact/) ## [Shopify Flow Automation Setup](/services/shopify-flow-automation) Inventory, fulfilment, fraud, segmentation, and B2B approvals automated with documented Flow workflows. - Inventory & fulfilment - Fraud & risk alerts - B2B approval routing [Learn more](/services/shopify-flow-automation) [Request a call](https://www.mejix.com/contact/) ## [Conversion Rate Optimization](/services/shopify-plus-cro) Research-led audits, speed work, funnel improvements, and structured A/B testing for measurable lift. - Diagnostic audit - Core Web Vitals work - A/B testing program [Learn more](/services/shopify-plus-cro) [Request a call](https://www.mejix.com/contact/) ## [International Shopify Plus Setup](/services/international-shopify-plus) Shopify Markets, multi-currency, localised content, tax, and hreflang done right — on a single Plus stack. - Markets configuration - Local payments & tax - International SEO [Learn more](/services/international-shopify-plus) [Request a call](https://www.mejix.com/contact/) Industries we serve ## Deep expertise across key verticals The patterns differ per industry — merchandising rules, compliance, subscription models, catalog depth. We've shipped in all five. ### B2B / Wholesale Complex pricing tiers, vendor portals, and bulk ordering. ### Clothing & Fashion Visual merchandising, size guides, and lookbooks. ### Health & Beauty Subscription models, ingredient transparency, and compliance. ### Jewelry & Accessories Personalisation, gift wrapping, and high-value checkout. ### Retail (Large Catalog) 50,000+ SKU management, PIM integration, and smart search. Our process ## A predictable delivery method The same sequence on every engagement, refined across enterprise Shopify Plus projects. 1. 01 ### Discovery Map business goals, technical reality, and constraints — in writing. 2. 02 ### Architecture System design and integration mapping for a scalable, maintainable stack. 3. 03 ### Development Agile build with weekly demos and a staging environment from day one. 4. 04 ### QA & Testing Cross-browser, accessibility, performance, and integration QA — automated where possible. 5. 05 ### Launch & Support Controlled cutover with hypercare and an ongoing engineering retainer. Tech stack & tools ## The stack we work in Shopify Plus Liquid Checkout Extensibility Shopify Functions Shopify Flow Hydrogen Oxygen React Remix Next.js GraphQL Storefront API Node.js TypeScript Sales Layer PIM Metafields Metaobjects Resources ## Go deeper Useful next stops — on this site and on mejix.com. ### On this site - [The Shopify Plus Migration Playbook ](/shopify-plus-migration-playbook) - [Browse case studies ](/case-studies) - [Read the engineering blog ](/blog) ### On mejix.com - [ Mejix — agency homepage About the company ](https://www.mejix.com/) - [ Mejix Services Full service catalogue ](https://www.mejix.com/services/) - [ About Mejix Team, locations, credentials ](https://www.mejix.com/about/) - [ Shopify Partner Directory listing Plus Tier verification ](https://www.shopify.com/partners/directory/partner/mejix-inc) ## Frequently Asked Questions Common questions about our Shopify Plus services. ### How long does a typical Shopify Plus migration take? ### What's the difference between Shopify and Shopify Plus? ### Can you integrate Shopify Plus with our existing ERP, CRM, or PIM? ### Do you offer ongoing support after launch? ### What industries do you specialise in? ### Do you support headless commerce on Shopify Plus? ## Let's scope your Shopify Plus project Let's discuss your project and see how Mejix can help you scale. [Request a Strategy Call](https://www.mejix.com/contact/) Mejix Certified Shopify Plus Partner (Plus Tier) delivering enterprise-grade ecommerce solutions for high-growth brands across 12+ countries. ✓ Shopify Plus Partner — Plus Tier #### Navigation [Home](/)[Services](/services)[Case Studies](/case-studies)[Blog](/blog)[Magento Migration](/shopify-plus-migration-from-magento)[WooCommerce Migration](/shopify-plus-migration-from-woocommerce)[Shopify Plus Partner](/shopify-plus-partner) #### Get in Touch [Request a Strategy Call](https://www.mejix.com/contact/) [hello@mejix.com](mailto:hello@mejix.com) [+1 (212) 401-6213](tel:+12124016213) New York, US Cluj Napoca, Romania #### Industries [Fashion](/industries/fashion-apparel)[Beauty](/industries/beauty-cosmetics)[Jewelry](/industries/jewelry-accessories)[Health & Wellness](/industries/health-wellness)[Furniture](/industries/home-furniture)[B2B & Wholesale](/industries/b2b-wholesale) #### US Markets [New York](/locations/new-york)[Los Angeles](/locations/los-angeles)[Chicago](/locations/chicago)[Miami](/locations/miami)[Dallas](/locations/dallas)[Atlanta](/locations/atlanta) © 2026 Mejix Inc. 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