Custom Shopify apps and integrations for complex commerce

B2B eCommerce product page design showing unisex workwear overall with clear pricing, specifications, and scalable purchasing options for industrial suppliers.Custom B2B eCommerce wholesale pricing table design displaying tiered volume discounts and dynamic pricing for bulk buyers.Warehouse inventory management interface for B2B eCommerce, showing stock availability by location and product quantity.
Interactive B2B eCommerce product configurator for selecting materials, colors, and pricing for industrial storage solutions.
Streamlined B2B eCommerce checkout UI showing company account details, order summary, and payment method for corporate buyers.

Shopify Plus is powerful — but enterprise commerce rarely fits into a standard setup.

We build the custom apps, middleware, APIs and integrations that connect Shopify with the systems your business already runs on. From ERP and PIM integrations to custom workflows, internal tools and headless storefronts, we help enterprise commerce teams turn Shopify Plus into a platform that fits their operations.

WHAT WE OFFER

We make it
connected,
automated & scalable

Custom Shopify Apps

We build custom Shopify apps for workflows that do not exist out of the box. From product logic and customer accounts to operational tools and business-specific admin features.

ERP, PIM & CRM Integrations

We connect Shopify Plus with the systems behind your business, including ERP, PIM, CRM, OMS, warehouse systems, analytics tools and custom internal platforms.

Middleware & APIs

When systems need to exchange data reliably, we build middleware, APIs and integration layers that keep products, prices, orders, customers and inventory in sync.

Workflow Automation

We help reduce manual work by automating recurring commerce processes such as order routing, data validation, customer segmentation, reporting and operational handovers.

Internal Tools

Not every solution belongs in the storefront. We develop internal tools, dashboards and admin interfaces that help your team manage complex commerce operations more efficiently.

Turning Shopify Plus into the platform your business actually needs

Enterprise commerce is rarely just a storefront.

Behind every serious Shopify Plus setup, there are product data structures, pricing rules, customer accounts, fulfillment processes, finance systems, sales workflows, analytics requirements and internal teams that need reliable tools.

Standard apps can solve some of these problems. But complex businesses often need more: custom logic, stable integrations, middleware, internal interfaces and technical ownership across the full system landscape.

That is where we come in.

We help teams extend Shopify Plus with custom apps and integrations that are built around how their business actually works, not around the limitations of a generic app setup.

Custom Commerce Logic

We build business-specific logic for pricing, product configuration, checkout behavior, customer accounts, ordering flows, approvals, discounts, fulfillment and internal operations.

Systems Integration

We connect Shopify Plus with the systems that matter to your business: ERP, PIM, CRM, OMS, WMS, accounting, marketplaces, analytics platforms and custom internal tools.

Data Sync & Middleware

We design reliable data flows between platforms, including products, variants, inventory, customer records, orders, invoices, pricing rules, content and custom data models.

Admin Tools & Dashboards

We develop internal tools that make complex processes easier for your team, from operational dashboards and support tools to product management interfaces and sales team workflows.

Headless & Custom Frontends

When the storefront needs more flexibility, we build custom frontend architectures with technologies like Next.js, React, Hydrogen and modern CMS platforms.

Our process

Built for complex systems. Delivered by focused senior teams.

Custom apps and integrations need more than implementation. They need a clear understanding of your business processes, data structures, technical dependencies and long-term platform roadmap.

Our process is designed to reduce risk, create clarity and build solutions that stay maintainable after launch.

System & Workflow Discovery

We start by understanding your current Shopify setup, internal processes, business goals and system landscape. Together, we identify which workflows need to be supported, automated or rebuilt.

1

Technical Audit & Architecture

We audit the relevant systems, APIs, data structures and operational dependencies. Based on that, we define the right architecture for your custom app, integration layer or middleware setup.

2

Solution Design

We translate business requirements into clear technical concepts. This includes data models, user flows, API behavior, sync logic, permissions, error handling and admin interfaces.

3

Development

We build the custom app, middleware or integration in focused delivery cycles. Our senior team stays close to the project, so decisions can be made quickly and implementation remains aligned with the business goal.

4

Testing & Quality Assurance

We test the full data flow and user journey end to end. That includes API behavior, data validation, sync reliability, edge cases, performance, security considerations and operational handovers.

5

Launch, Monitoring & Optimization

After launch, we help your team stabilize the new setup, monitor critical flows and improve the solution over time. Custom systems need long-term ownership, and we can support both ongoing maintenance and further development.

5

Our tech stack

Shopify logo

Shopify Plus

We use Shopify Plus as the commerce foundation for scalable storefronts, B2B platforms and multi-market setups. It gives enterprise teams a strong base while allowing us to extend the platform through custom apps, APIs and integrations.

And...

Complex commerce systems often require more than Shopify alone. We build apps, middleware and custom frontends using technologies like Node.js, Next.js, React, Hydrogen, TypeScript, APIs, webhooks, cloud infrastructure, CMS platforms, PIM systems, ERP connections and analytics tools.

What we build and connect

Custom Shopify apps
Shopify Admin extensions
Custom storefronts
Headless Shopify frontends
Middleware platforms
ERP integrations
PIM integrations
CRM integrations
OMS integrations
Warehouse and fulfillment integrations
Inventory sync
Product data sync
Customer data sync
Order and invoice sync
Custom pricing logic
Customer-specific catalogs
B2B account workflows
Approval flows
Checkout-related workflows
Reporting dashboards
RESults and clients

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We are proud to maintain strong long-term
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Delivered commerce projects

Our clients praise their websites and apps as user-friendly, high-performing, visually impressive, and - most importantly - reliable and fully functional.

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Clients across DACH and Europe

We work with ambitious commerce teams across the DACH region and Europe. From B2B specialists and fast-growing DTC brands to enterprise organizations with complex system landscapes.

Unilever logoBayWa logoSky logoASUS logoGDCh logoPieroth logoLes Lunes logoLykon logoFairPrice logoPGM Art worlD logovetevo logoplants are purple logo

Our clients
success stories

FAQS

Your big questions

What types of custom apps and integrations do you build?
When should we build a custom app instead of using an existing Shopify app?
Can you integrate Shopify Plus with ERP, PIM, CRM or warehouse systems?
What information do I need to get started?
How long does a custom app or integration project take?
Can you maintain and improve existing custom apps?
How do you make sure integrations are reliable?
What is your pricing structure?
What sets you apart from other agencies?
testimonials

What Enterprise and B2B Commerce Teams Say About Working with Us

"Switching to Shopify Plus was an important step for us. Especial impressed us not only with speed and pragmatism, but above all with the ability to confidently navigate this environment, think along with us and actively drive solutions forward."

Tim Kahle
Webshop & E-Commerce Specialist, Unilever Germany GmbH

"The shop is easy to use, very fast, looks good and most importantly: it just works. You took the concerns seriously and really understood the needs. This shop is now a great added value for us compared to our competitors."

Claudio Grolimund
Managing Director, Food Solutions, Unilever Switzerland GmbH

"Especial Digital built our B2B Shopify store and the result is a future-proof and expandable platform that is specifically tailored to the needs of our customers."

Dennis Rossiar
Marketing Head at Betriebseinrichtung-Sofort

"Especial was exactly the right partner for our relaunch. They supported us with all challenges related to design and associated technical services and always delivered on time."

Nicolas Johansson
Digital Manager at Pieroth

"Especial – what a force of nature! They came up with great ideas to re-organize our B2C and B2B E-Commerce. The B2B catalog gives us a leg up over competitors and is even attracting new partnerships!"

Jörg Kühn-Thomas
Owner of PGM ArtWorlD

"In Especial we have found an agency that has not only implemented our specific wishes but has also contributed to our company's success with their expert advice."

Dr. Daniel Ringbeck
Product Head at Vetevo

"They are very familiar with the JAM stack that we want to rely on in the future. Plus, they offer fair billing based on work done in the project phases – agile and flexible service."

Dr. Maximilian Bräutigam
Chief Digital Officer at GDCh
Get in touch

Planning a Shopify
Plus migration or complex
commerce project?

Talk to Malte about your current setup, migration risks and the fastest path to a scalable Shopify Plus platform.

If you prefer, you can email us at hello@especial.digital
Talk to Malte
Co-founder of Especial.
Book a call
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