Shopify Plus Development Services for Enterprise and High-Growth Brands

Your checkout is your revenue engine. Your international expansion shouldn't mean six months of guesswork. And your ERP integration shouldn't break every time Shopify releases an update.

  • We build, migrate, and optimize Shopify Plus stores for brands that have outgrown standard Shopify - or outgrown the agency that set it up.
  • Checkout extensibility built on Shopify's latest APIs - no deprecated code, no upgrade risk.
  • Shopify Markets and multi-currency configured for real localization, not just a flag dropdown.
  • B2B and wholesale workflows with company accounts, net terms, and custom catalogs.
  • ERP, CRM, and 3PL integrations with NetSuite, Salesforce, HubSpot, ShipBob, and more.
  • Founder-led delivery - your project is reviewed by an engineer with 15+ years of experience, not handed to a junior.
Get a Free Shopify Plus Audit
Shopify Plus interface mockup for enterprise checkout and multi-market development

When Does Shopify Plus Actually Make Sense?

Not every store needs Plus. If your order volume is low and your checkout is simple, standard Shopify handles the job. But there are signals that tell you it’s time to upgrade – or that your next build should start on Plus from day one.
FeatureStandard ShopifyShopify Plus
Checkout customizationLimited to basic settingsFull Checkout Extensibility API - custom payment logic, post-purchase upsells, delivery rules
International sellingManual multi-currencyShopify Markets with localized pricing, domains, and catalog control per region
B2B commerceNot supported nativelyCompany accounts, net terms, custom price lists, quantity rules
AutomationBasic Shopify FlowAdvanced Flow with custom triggers, conditional logic, and error handling
API rate limitsStandard2× higher - critical for ERP/CRM sync at scale
Expansion storesAdditional plan per storeUp to 9 expansion stores included
Launch supportSelf-serveDedicated launch engineer from Shopify

Your store likely needs Shopify Plus if:

  • You process more than $500K/year and checkout performance directly impacts revenue
  • You sell in 3+ countries and need localized pricing, taxes, and content
  • Your wholesale or B2B channel requires company accounts and custom catalogs
  • You're running 5+ integrations that need reliable sync and higher API limits
  • You're migrating from Magento, BigCommerce, or WooCommerce and want an enterprise-grade foundation
This isn’t about paying more for a logo. It’s about unlocking the APIs and infrastructure your operations actually need.
Not sure if Plus is right for your store? Let's talk →
Illustration of a shopping cart with a plus icon representing add to cart for an online store
Why SpecialCase

Why Brands Choose SpecialCase as Their Shopify Plus Development Company

We’re not a 200-person outsourcing operation that assigns your project to whoever is available. SpecialCase is a boutique Shopify Plus development agency with a core team of senior experts – and every engagement is led by our founder.

Here’s what that means in practice:

1. Direct access to senior developers
No account managers relaying messages. You talk to the engineers building your store – daily on Slack, weekly on architecture calls.
2. 70+ projects delivered since 2010
We’ve shipped eCommerce stores, custom web apps, and SaaS platforms across 10+ countries. Shopify Plus is where our eCommerce work lives today.
3. Architecture-first approach
Before writing a single line of code, we map your data flows, integration points, and checkout logic. This prevents the “it works on staging but breaks in production” problem that plagues fast builds.
4. Migration expertise across platforms
We’ve migrated stores from WooCommerce, OpenCart, Magento, and custom platforms to Shopify Plus – with SEO protection (URL mapping, 301 redirects, metadata transfer) baked into the process.
5. Post-launch ownership
We don’t disappear after go-live. Our retainer clients get optimization sprints, conversion iteration, and integration monitoring as ongoing services.
6. Verified by clients, not just by us
We’re rated on Clutch, hold Top Rated Plus status on Upwork, and are listed on GoodFirms. Our reviews live on third-party platforms we don’t control – which is exactly the point.

Not sure if your business needs the enterprise-level features of Plus just yet? For standard store setups and high-converting themes, consider starting with our Shopify Development Services page.

Custom Shopify Plus Development Capabilities

Checkout Extensibility and Conversion Engineering

Your checkout is where revenue is won or lost. We build on Shopify's Checkout Extensibility API - the current, upgrade-safe standard - so your customizations survive every platform update, providing reliable Shopify Plus customization services.
What's included:
  • Checkout UI extensions (custom fields, trust badges, delivery promises)
  • Payment and shipping logic customization
  • Post-purchase upsell and cross-sell flows
  • Checkout performance auditing and friction analysis
  • A/B testing support for checkout variations
Checkout extensibility and conversion engineering for secure, upgrade-safe checkout customization

Shopify Markets and International Expansion

Selling internationally on Shopify Plus isn't just about turning on another currency. It's about localized pricing, region-specific content, proper tax handling, and a checkout that feels native to each market.
What's included:
  • Shopify Markets configuration with per-region pricing and product availability
  • Local domain and subdomain strategy
  • Localized content governance (language, imagery, legal compliance)
  • Currency rounding rules and duty/tax handling
  • Market-specific UX adjustments
Mobile view of an online store product page supporting multi-region selling with Shopify Markets

Shopify Plus B2B and Wholesale

Shopify Plus has evolved from a DTC platform into a serious B2B option. We build B2B purchasing experiences that handle the complexity wholesale buyers expect - without bolting on third-party apps for every feature.
What's included:
  • Company accounts with role-based access
  • Custom price lists and volume-based pricing rules
  • Quote request and reorder workflows
  • Net payment terms and purchase order support
  • B2B checkout logic and policy enforcement
B2B ecommerce analytics dashboard illustrating Shopify Plus account workflows for wholesale purchasing

Shopify Flow and Operations Automation

Manual processes don't scale. We design automation using Shopify Flow - from order tagging and fraud flagging to inventory alerts and customer segmentation - so your operations team focuses on decisions, not data entry.
What's included:
  • Shopify Flow architecture for order lifecycle events
  • Automated tagging, segmentation, and notification workflows
  • Error handling and fallback logic for critical flows
  • Integration-triggered automations (inventory sync, fulfillment status)
  • Documentation and team training on Flow management
Person using a smartphone with automation and analytics icons representing Shopify Flow operations automation

Shopify Functions and Custom Backend Logic

Shopify Functions let you run custom logic directly on Shopify's infrastructure - for discounts, payment methods, delivery options, and cart validation. We use Functions when built-in rules aren't flexible enough for your business model.
What's included:
  • Custom discount functions (tiered, conditional, product-specific)
  • Payment and delivery customization functions
  • Cart validation logic for complex product rules
  • Performance-optimized Wasm/Rust implementations
Online store interface with custom logic overlay for discount functions and cart rules

Enterprise Integrations - ERP, CRM, 3PL

Your Shopify Plus store isn't a standalone system. It's the front end of your operations stack. We map your data flows and build integration layers that are reliable, documented, and monitored.
What's included:
  • Data flow mapping and integration architecture
  • API connection development and webhook configuration
  • Error monitoring, retry logic, and alerting
  • Sync validation and data integrity checks

Founder-Led Enterprise Delivery

This is not a volume agency model.

SpecialCase was founded by Alex Budovskyi, a Certified Shopify Developer and Full-Stack Engineer with 12+ years building high-performance eCommerce solutions for brands across the US, Europe, and Australia. Alex personally leads every Shopify Plus engagement - from architecture and checkout extensions to custom app development and performance optimization. On Upwork, SpecialCase holds Top Rated Plus status, earned by consistently delivering complex projects on scope and on time.

Direct Founder Involvement

  • Architecture decisions - checkout flows, data models, integration design
  • Code reviews - quality control on every sprint deliverable
  • Risk management - proactive identification of scope, timeline, and technical risks
  • Client communication - you talk to the person accountable for your project, not a relay

Engagement principles

  • Direct access to technical decision-makers - no PM buffer
  • Weekly architecture and delivery checkpoints
  • Transparent priorities, tradeoffs, and release planning
  • A development pod that scales with your roadmap

How we're structured

  • Alex Budovskyi - Founder & CTO - Architecture, code review, delivery oversight
  • Senior Shopify Developer(s) - Experts in Shopify Plus theme development, Liquid, and checkout extensions.
  • Integration Engineer - API connections, data sync, middleware
  • QA Specialist - Cross-device testing, regression, go-live validation

How We Work

How a Shopify Plus Engagement Works

Every Plus project follows a structured, phased approach. No surprises, no scope creep without a conversation first.

Start Your Project
01

Discovery and Strategy (1–2 weeks)

We audit your current store (or platform), map your integration landscape, and define the technical scope. You get a strategy document with architecture decisions, risk flags, and a phased timeline.

02

Architecture and Design (1–2 weeks)

We design your checkout flow, data model, and integration architecture before any development begins. Theme design or custom UI work happens in parallel.

03

Development and Integration (4–8 weeks)

Build happens in 2-week sprints with weekly demos. Integrations are built and tested against staging environments. You see working code every week.

04

QA, Migration, and Launch (1–2 weeks)

Full cross-browser and device testing. If migrating, we execute URL redirects, data transfer, and SEO validation. Launch is coordinated with your team on a planned date.

05

Post-Launch Optimization (ongoing)

After launch, we run optimization sprints - conversion improvements, performance tuning, new feature rollouts, and integration monitoring. Most clients stay on a monthly retainer.

CASE STUDIES

Shopify Plus Project Examples

Shopify Plus storefront homepage screenshot featuring winter sports imagery

International Rollout on Shopify Plus - SRFACE

Markets • Shopify Plus • Localization
+3 Markets launched
+21% Completed checkout
Challenge:
SRFACE, a sustainable DTC wetsuit brand from the Netherlands, needed a Shopify Plus store that could handle international sales - and a way to help customers find the right wetsuit size without guesswork or returns.
Solution:
  • Shopify Plus store with multi-market configuration for European and international shipping
  • Custom AI-powered Size Finder chatbot (built on ChatGPT) that recommends wetsuit sizes based on the customer's body measurements
Result:
Launched in 3 new international markets within the projected timeline, stable checkout performance across all regions
Shopify AI Size Finder Case Study →
Lumio Shopify homepage hero screenshot on mobile showing product lighting

Checkout Performance and Conversion Recovery - Lumio

Electronics • Shopify Plus • CRO
+23% Mobile conversion rate
+18% Speed improvement
Challenge:
Lumio, an award-winning DTC design brand based in San Francisco, needed custom Shopify animations and a checkout experience that matched their premium brand positioning - without sacrificing load time.
Solution:
  • Custom theme with performance-optimized animations and interactive product pages
  • Checkout flow aligned with premium brand UX standards
Result:
21% increase in checkout completion rate, 23% improvement in mobile conversion
View case study →
Explore all case studies →

Full Stack Technologies for Shopify Plus Sites

Shopify Plus Development - Frequently Asked Questions

What is the difference between Shopify and Shopify Plus for development?

Shopify Plus unlocks the Checkout Extensibility API for full checkout customization, Shopify Functions for custom backend logic (discounts, payment rules, delivery options), higher API rate limits for reliable integrations, and B2B features like company accounts and custom price lists. Development on Plus is typically more architecture-driven because the customization possibilities – and the stakes – are both higher.

Do we need Plus to improve conversion?

Not necessarily. Many brands can improve conversion on standard Shopify through theme optimization, UX improvements, and page speed tuning. Shopify Plus becomes the right choice when your conversion goals depend on checkout-level customization, advanced payment logic, or operational changes that standard Shopify doesn’t support. We’ll tell you honestly if Plus is overkill for your situation.

Can you migrate us to Shopify Plus from another platform?

Yes. We manage full migrations from WooCommerce, Magento, OpenCart, BigCommerce, and custom platforms to Shopify Plus. Every migration includes data mapping, SEO protection (URL redirects, metadata transfer, sitemap validation), integration reconnection, and a staged rollout plan to minimize risk.

How long does a Shopify Plus implementation take?

A typical Shopify Plus web development project runs 8–14 weeks from discovery to launch, depending on integration complexity and checkout customization scope. We start with a 1–2 week strategy phase to define scope and architecture, then build in 2-week sprints. Migration projects may add 2–4 weeks depending on catalog size and redirect volume.

What ERP, CRM, and 3PL systems do you integrate with?

We regularly integrate Shopify Plus with NetSuite, SAP Business One, and Microsoft Dynamics (ERP); Salesforce and HubSpot (CRM); ShipBob, ShipStation, and Whiplash (3PL); and marketing platforms like Klaviyo and Attentive. For less common systems, we build custom middleware or API connectors.

Do you provide post-launch support for Shopify Plus?

Yes. Most of our Plus clients transition to a monthly retainer after launch. Retainer work includes conversion optimization sprints, new feature development, integration monitoring, and Shopify platform update management. We don’t disappear after go-live.

Can you work alongside our in-house engineering or marketing team?

Absolutely. We frequently operate as a specialist Shopify Plus partner embedded in a client’s existing workflow – Slack channels, shared repos, joint sprint planning. Your in-house team handles what they do best; we handle the Plus-specific architecture, checkout, and integrations.

Do you work with Shopify Hydrogen or headless setups?

We evaluate headless (Hydrogen/Oxygen) against your specific requirements. For most brands, Shopify’s standard Liquid-based storefront with Plus features delivers better ROI than a headless build. When headless is genuinely the right fit – complex content management needs, multi-channel data sources, performance requirements beyond Liquid’s ceiling – we recommend and scope it appropriately.

How do I know if my project is a good fit for SpecialCase?

We work best with DTC and B2B brands doing $1M–$20M/year in revenue, teams that value direct access to senior developers over layers of project management, and businesses where Shopify Plus is – or should be – the core of their commerce infrastructure. If you’re looking for the cheapest option or a quick theme install, we’re probably not the right match.

Other Development Services

Design & UI/UX
Web Application Development
High-Converting Websites Development
24/7 Server Maintenance
Mobile App Development
API Integration Services
Ready to Build Your Shopify Plus Store the Right Way?
Tell us about your project - current platform, integration needs, and growth goals. You'll get an honest assessment of whether Shopify Plus is the right fit, and a clear scope for what a build or migration would look like.
Need a simpler setup first? Explore Shopify Development Services.




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