INDEXIZ

Shopify · Plus

Shopify Plus Development for High-Volume Brands

Checkout extensibility, Shopify Functions, Flow automations, B2B storefronts, multi-store and international setups built by a team that runs Plus stores through their biggest sales days.

MJSWDTAK25+ Plus brands scale with Indexiz
Plus buildpeak: 1.2k orders/hr
CheckoutExtensions · BrandingFunctionsDiscounts · Shipping · PaymentFlowTagging · Fraud · FulfilmentMarketsCurrencies · Expansion stores
✓Checkout extension liveUpsell block · +9% AOV
3 wksto launch a B2B storefront
25+Shopify Plus stores
1.2kOrders per hour handled at peak
40+Flow automations built
+9%Average AOV from checkout extensions
What we build

Shopify Plus Services We Offer

Plus unlocks checkout, automation and B2B capabilities that most agencies never touch. We use them to remove manual work and grow revenue per order.

Checkout Extensibility

Checkout UI extensions, branding and custom fields that replace checkout.liquid before it is retired, tested on Shop Pay and every payment method.

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Shopify Functions

Custom discount, shipping, payment and cart validation logic deployed as Functions for speed and reliability at peak volume.

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Flow & Launchpad Automation

Order tagging, fraud rules, fulfilment routing, inventory alerts and scheduled sales built with Flow and Launchpad.

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B2B on Shopify

Company accounts, catalogues with price lists, quantity rules, net payment terms and a self-serve wholesale storefront.

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Multi-store & International

Expansion stores, Shopify Markets, local currencies, languages and tax configuration for cross-border growth.

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ERP, OMS & 3PL Integrations

Reliable, monitored integrations with your ERP, warehouse and fulfilment partners using custom apps and webhooks.

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Real use cases

Shopify Plus Work We've Delivered

Beauty

Replatform to Plus with checkout upsells

Custom theme, subscriptions, checkout UI extensions and Klaviyo flows for a fast-growing skincare brand.

+9%average order value
Wholesale

B2B storefront for a food distributor

Company accounts, net terms, price lists and ERP order sync launched in three weeks.

80%orders now self-serve
Fashion

Four markets on one Plus store

Markets, local pricing and language setup plus Flow rules for regional fulfilment.

4countries, one back office
Why Indexiz

Why Indexiz for Shopify Plus

We build with Shopify’s native primitives, Functions, extensions, Flow and Markets, so your store stays supported through every platform change and sales peak.

Native, Not Hacked

Functions and extensions instead of scripts and theme hacks that break on the next update.

Built for Peak Days

Load-tested checkouts, pre-launch Flow checks and on-call cover for your biggest campaigns.

Integration Depth

ERP, OMS, PIM and 3PL connectors with retries, logging and alerts so operations run without surprises.

Shopify Plus Experience

A team that has launched Plus stores across beauty, fashion, food and B2B wholesale.

Our approach

Use Plus for What Only Plus Can Do.

We review your current setup, identify where Plus features remove apps and manual work, and deliver them in short, measurable releases.

Technologies

Shopify Plus Capabilities We Use

The Plus toolkit we work with every day, alongside the systems your operations depend on.

Our process

A Simple Path to Success

A proven process to turn your ideas into powerful digital solutions.

01

Review

Audit of your store, apps, checkout and operations against Plus capabilities.

02

Roadmap

Prioritised plan of extensions, Functions, Flow and integrations with expected impact.

03

Build & Test

Short releases tested against real orders, payment methods and peak loads.

04

Scale

Monitoring, peak-day cover and ongoing improvements as the brand grows.

FAQ

Frequently Asked Questions

Answers to the questions we hear most often. Need more detail? Talk to our team.

Plus pays off when you need checkout customisation, B2B, multiple stores or markets, or when automation can replace manual operations. We’ll review your numbers and tell you honestly.

Yes. We rebuild checkout customisations as checkout UI extensions and Functions, which are the supported path, and test them across every payment method.

Yes. Shopify’s native B2B lets one store serve wholesale and retail customers with separate catalogues, pricing and payment terms.

Yes. We build custom apps and webhook integrations with Odoo, NetSuite, SAP, Dynamics and others, with monitoring and retries built in.

Yes. Plus clients can move to a monthly retainer covering monitoring, peak-day cover, new features and app updates.

Ready to scale on Plus?

Get More from Your Shopify Plus Investment

Tell us about your store and growth plans and we’ll propose a Plus roadmap with scope, timeline and expected impact.

Or schedule a free consultation

Serving organizations across the world.

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