SHOPIFY & SHOPIFY PLUS
Shopify Development Services
We build and scale Shopify and Shopify Plus stores for enterprise brands — custom development, migrations, and integrations that turn high-volume traffic into revenue.
Certified Shopify Plus Partner · 15+ Years in Enterprise eCommerce · 24/7 Global Support
Who We Work With
When your store outgrows out-of-the-box Shopify, you need a development partner who can handle enterprise complexity: high transaction volumes, custom checkout logic, ERP and CRM integrations, and B2B workflows.
As a certified Shopify Plus Partner, Atwix builds custom themes, headless storefronts, and deep integrations for brands that can’t afford downtime or mediocre performance — whether you’re migrating from Magento, WooCommerce, or BigCommerce, or scaling an existing Shopify store.
Talk to us if you need to:
Migrate to Shopify without losing rankings or customer data
Build custom features around a complex catalog or checkout
Hire Shopify developers who’ve shipped enterprise B2B and B2C
Add headless, PWA, or custom app functionality
Our Shopify Development Services
BUILT AROUND YOUR CATALOG
Bespoke themes, advanced product configurators, dynamic filtering, and custom checkout flows built around your brand and business logic. For complex catalogs and premium positioning where a template won’t do.
- Custom theme & Liquid development
- Product configurators & dynamic filtering
- Custom checkout & cart logic
Theme Design & Customization
CONVERSION IN THE DETAILS
Conversion-focused theme work — optimized layouts, mobile responsiveness, and custom functionality without slowing the site down. Faster time-to-market when you’re enhancing an existing foundation.
- Liquid theme customization
- Mobile & Core Web Vitals optimization
- CRO-focused layout work
ONE CONNECTED STACK
Connect Shopify to your full stack — ERP, CRM, PIM, payments, loyalty, POS, and shipping — with data accuracy and automation built in. We eliminate the manual workflows that slow operations down.
- ERP & CRM integration (NetSuite, SAP, Salesforce)
- Klaviyo, Yotpo, ShipperHQ, Celigo
- Custom middleware & API work
MOVE WITHOUT THE DROP
Full migration from Magento, WooCommerce, or BigCommerce — products, customers, order history, content, and SEO equity transferred accurately, with staging tests and rollback to protect rankings.
- Data mapping & staging-environment testing
- SEO equity preservation & 301 redirects
Headless & Performance
SPEED IS REVENUE
PWA and API-first builds for brands that need speed and flexibility beyond the standard theme layer — plus ongoing performance tuning for Core Web Vitals.
- Headless / API-first architecture
- PWA development
- Core Web Vitals & speed optimization
Ongoing Support & Optimization
BETTER AFTER LAUNCH
Performance monitoring, security updates, A/B testing, CRO, and strategic consulting. Your store should improve over time, not stagnate after go-live.
- Monitoring, security & updates
- A/B testing & CRO
- Tiered support packages
A 0.1-second improvement in mobile site speed increased retail conversions by 8.4% and average order value by 9.2%.
— Deloitte & Google, Milliseconds Make Millions (37 brands, 30M+ sessions)
Build a Shopify store that scales with your business, not against it.
Talk to engineers who’ve shipped Plus builds for enterprise B2B. Free consultation, no commitment, straight technical answers from people who know the platform inside out.
Shopify Plus Development Services
If you’re processing $1M+ in annual revenue, Shopify Plus unlocks customizable checkout, 10x higher API limits, multi-store management, and Shopify Flow automation. As a Shopify Plus agency and certified Plus Partner, we build:
- Custom checkout experiences and complex discount logic
- B2B portals with custom pricing, quote management, and bulk ordering
- Multi-brand and international store architectures
- High-volume integrations standard Shopify can’t support
Shopify Plus makes sense when you:
For complex buyer workflows, see our B2B eCommerce solutions →
Why Brands Choose Atwix
| Atwix | Typical agency | |
|---|---|---|
| Shopify partnership | Certified Shopify Plus Partner | Often no official partner status |
| Custom development | Themes, headless, complex integrations | Mostly template-based |
| Experience | 15+ years in enterprise eCommerce | Typically 2–5 years |
| Post-launch | 24/7 monitoring & optimization | Minimal support after launch |
| B2B & complex commerce | B2B portals, ERP integration, custom pricing | Mostly B2C |
| Platform range | Adobe Commerce, Shopware, BigCommerce too | Single-platform focus |
A multi-platform partner gives you honest advice — including when Shopify isn’t the right call. Single-platform agencies can’t.
How We Work
Ready to scale on Shopify?
We’ll audit your current setup, flag growth opportunities and technical gaps, and give you a clear roadmap with a transparent estimate.
Industries We Serve
Frequently Asked Questions
Got some questions? We’re here to answer. If you don’t see your question here, drop us a line with out Contact form.
What is the difference between Shopify and Shopify Plus?
Shopify Plus is the enterprise-level version of Shopify designed for high-growth businesses. Key differences include unlimited bandwidth, customizable checkout, higher API limits (10 times the standard Shopify), automation capabilities via Shopify Flow, multi-store management, dedicated account management, and access to exclusive apps. Shopify Plus starts at $2,000/month and is ideal for businesses that process over $1 million in annual revenue or require advanced B2B functionality.
Why should I hire Shopify Plus experts instead of building in-house?
Hiring a Shopify Plus development agency like Atwix gives you immediate access to 15+ years of eCommerce expertise, 300+ certifications, and a proven methodology. Building in-house requires recruiting specialized developers (with an average salary of $120K+), training them on Shopify Plus architecture, and managing their ongoing professional development. With Atwix, you get a whole team—developers, designers, QA specialists, strategists—at a fraction of the cost, with faster time-to-market and lower risk.
How long does a typical Shopify Plus development project take?
Project timelines vary based on complexity. A straightforward migration with minimal customization typically takes 8 to 12 weeks. Custom theme development with moderate integrations runs 12 to 16 weeks. Complex B2B portals with extensive ERP integration, custom apps, and advanced functionality can take 16 to 24 weeks to develop. During the discovery phase, we’ll provide a detailed project plan with milestones and realistic timelines tailored to your specific requirements.
How much does Shopify Plus development cost?
Shopify Plus itself starts at $2,000/month (platform fees). Development costs vary based on scope. A basic migration and theme customization may range from $25K-$50K, while enterprise implementations with custom apps, complex integrations, and advanced functionality typically range from $75K-$250K+. We provide transparent pricing with detailed estimates during the discovery phase, ensuring that there are no hidden costs or surprises.
Do you provide ongoing support after launch?
Absolutely. Our engagement doesn’t end at launch. We offer comprehensive post-launch support, including performance monitoring, security updates, feature enhancements, conversion rate optimization, and strategic consulting. Support packages range from basic monitoring (Bronze tier) to comprehensive ongoing optimization with dedicated account management (Gold tier). Most enterprise clients opt for ongoing partnerships to ensure continuous improvement and growth.
Can you migrate my store from Magento/WooCommerce/BigCommerce to Shopify Plus?
Yes, we’re experts in platform migration. We’ve successfully migrated dozens of stores from Magento (Adobe Commerce), WooCommerce, BigCommerce, and custom platforms to Shopify Plus. Our migration process preserves product data, customer records, order history, blog content, and SEO equity, ensuring a seamless transition. We handle URL mapping with 301 redirects, ensuring zero impact on search rankings. Most migrations complete in 10-16 weeks with minimal downtime.
What integrations can you build for Shopify Plus?
We’ve built hundreds of integrations connecting Shopify Plus to ERP systems (NetSuite, SAP, Microsoft Dynamics), CRM platforms (Salesforce, HubSpot), PIM solutions (Salsify, inriver), marketing automation (Klaviyo, Marketo), fulfillment systems, payment gateways, loyalty programs, and custom APIs. We’re technology-agnostic and can integrate with virtually any system that offers an API or data export capability.
How do you ensure site performance and speed?
Performance is built into our development process, not added afterward. We optimize for Core Web Vitals (LCP, FID, CLS), implement lazy loading for images, minimize JavaScript, utilize Shopify’s CDN, optimize theme code, and conduct performance testing prior to launch. We target 90+ Lighthouse scores and sub-2-second load times. Following the launch, we continuously monitor performance and make adjustments as necessary.
Do you specialize in B2B eCommerce?
Yes, B2B commerce is one of our core specializations. We build custom B2B portals with features like tiered pricing, customer-specific catalogs, part number search, bulk ordering, quote management, approval workflows, and credit terms. Our B2B solutions seamlessly integrate with ERP systems, enabling real-time inventory management, pricing, and order processing. We’ve delivered B2B projects for manufacturers, distributors, and wholesale businesses across multiple industries.
What makes your approach different from other agencies?
Three key differentiators: (1) Platform-agnostic expertise—we’re certified across Shopify Plus, Adobe Commerce, Shopware, and BigCommerce, so we recommend the right solution for your business, not just what we know. (2) Strategic partnership—we don’t just build, we consult on business strategy, customer experience, and growth planning. (3) Enterprise depth—our team has delivered projects for Fortune 500 brands, giving us experience with complex requirements that most agencies never encounter.
