Shopify Plus is a different platform from standard Shopify. The checkout is fully customisable via Checkout Extensibility and Shopify Functions. The B2B suite handles company accounts, custom catalogues, and payment terms natively. The API rate limits are ten times higher. And Shopify Scripts, the old approach to checkout logic, will stop functioning entirely on 30 June 2026. Businesses that built their checkout rules on Scripts need a Shopify Plus developer now, not later. KiwiCommerce is a UK-based, official Shopify Experts partner with a team certified in Shopify Plus development.
Shopify Plus becomes the right choice when a standard Shopify store starts hitting operational limits, checkout customisation requirements that standard plans cannot meet, B2B wholesale needs that third-party apps handle badly, or revenue volumes where the reduced transaction fees on Plus change the economics. Our Shopify Plus developers work with brands at all of these tipping points.
Get In TouchYou are on standard Shopify and approaching the point where Checkout Extensibility, higher API limits, and Launchpad for campaign automation justify the move to Plus. Our developers handle the migration cleanly and set up the Plus-exclusive features that make the upgrade worth the investment from day one.
Shopify Plus includes a native B2B suite with company accounts, custom price lists, net payment terms, and PO-based checkout, all without third-party app workarounds. Our dedicated B2B Shopify Plus developers configure and extend these features to match how your trade customers actually buy.
You have a client project on Shopify Plus and need a certified development resource delivered under your brand. We work as your white-label Shopify Plus partner. Your client sees your name. We supply the expertise.
Shopify Scripts stop functioning on 30 June 2026. If your checkout discount logic, custom shipping rules, or payment method visibility is built on Scripts, your store needs to be migrated to Shopify Functions before that date. Our Shopify Plus developers handle this migration and rebuild the logic correctly in Checkout Extensibility.
Shopify Plus is the enterprise tier of Shopify. It sits above all standard Shopify plans and unlocks a set of capabilities that are either absent or significantly restricted at lower tiers. The headline differences matter for specific types of business. Standard Shopify lets you apply your logo and brand colours to the checkout. Shopify Plus lets you control how the checkout actually behaves, including custom fields, upsell blocks, dynamic discount rules, payment method visibility by customer segment, and unique logic for B2B buyers. This is all built through Checkout Extensibility and Shopify Functions, which are Plus-exclusive tools.
The platform also handles B2B wholesale natively. Company accounts with multiple buyers, custom price lists per company, net payment terms built directly into checkout, and purchase order support are all available without the complexity and ongoing cost of stacking third-party apps. For brands operating both DTC and wholesale from one platform, Shopify Plus is the cleaner architecture.
One critical date for any Shopify Plus store to be aware of: Shopify Scripts, the legacy checkout customisation tool, will stop working on 30 June 2026. Stores that built discount logic, shipping rules, or checkout flows on Scripts need those rebuilt in Shopify Functions before that deadline. Our Shopify Plus developers handle these migrations as time-sensitive work because missing the date means broken checkout on a live trading store.
Here is what our Shopify Plus developers build and maintain:
2+ Experience Years
For contained Shopify Plus tasks within a larger project that has senior oversight. Theme customisation, app setup and configuration, basic Liquid code work, and straightforward content or layout changes. These developers work efficiently on well-defined scopes. Not suited for Checkout Extensibility, custom app builds, or complex integrations without senior guidance.
5+ Experience Years
Custom Shopify Plus theme development, Shopify Functions for discount and shipping logic, third-party app integrations, performance optimisation, and standard ERP connection work. These developers manage Shopify Plus projects independently, handle mid-complexity B2B configuration, and make sound decisions about when a custom app is the right answer versus an App Store solution.
7+ Experience Years
Complex Checkout Extensibility builds, custom private app development using Shopify CLI, advanced Shopify Functions with multiple discount stacks, enterprise ERP integrations handling high API call volumes, multi-store expansion architectures, and Shopify Plus B2B at scale. These developers lead large Shopify Plus projects, mentor junior team members, and make the architectural decisions that determine whether a Plus build stays clean and maintainable over time.
5+ Experience Years
Specialist in Shopify Plus's native B2B suite. These developers configure company accounts with custom roles and permissions, build company-specific price lists and catalogues, set up net payment terms within the checkout, configure PO-based ordering, and extend the B2B layer with custom apps where the native functionality does not cover the full buying workflow. They understand both the capabilities and the current limitations of Plus B2B, including the lack of Shop Pay and Apple Pay in the B2B checkout, and design around them sensibly.
5+ Experience Years
Builds private and public apps for Shopify Plus using Shopify CLI, the Polaris design system, and Shopify's Admin and Storefront APIs. These developers create the functionality that the App Store cannot provide: custom fulfilment logic, merchant- specific reporting dashboards, bespoke customer account tools, and deeply integrated workflow automation. They understand Shopify's app review standards and build apps that stay compatible with platform updates.
7+ Experience Years
For complex Shopify Plus builds or migrations, the technical decisions made at the start determine the quality of everything that follows. These developers assess your current Shopify setup or source platform, design the Shopify Plus architecture, including app stack, integration layer, and checkout structure, and lead the development team through delivery. They decide what gets custom-built versus sourced from the App Store, and why, reducing wasted spend on the wrong tools.
KiwiCommerce holds Official Shopify Experts status, verified by Shopify itself. This is not a self-declared credential. It means our developers have been assessed against Shopify's own standards for technical depth and client delivery. When you hire Shopify Plus development experts from our team, you work with people whose Shopify credentials are on record with the platform.
Every Shopify Plus developer on your project is based in the UK. Calls happen at a sensible time. Questions get answered the same day. When something breaks on your Shopify Plus checkout during a sale event, you reach someone who is at their desk and can respond. No overnight handoffs. No time zone guessing.
Shopify Scripts will stop working on 30 June 2026. If your checkout relies on Scripts for discount logic, payment filtering, or shipping rules, you have a fixed deadline. Our Shopify Plus developers are already migrating stores from Scripts to Shopify Functions. We assess your existing Script logic, rebuild it correctly in Functions, and test it against your checkout before the deadline arrives.
There is a significant difference between a Shopify Plus build that uses platform tools correctly and one that works through workarounds. Our developers write code that stays compatible with Shopify platform updates, uses Shopify CLI and Polaris standards for app builds, and structures checkout customisations in a way that another developer can pick up and maintain without a three-hour briefing.
Your store logic, client relationships, and business data remain private. We sign non-disclosure agreements as standard. For agencies using us as a white-label Shopify Plus resource, we operate completely under your brand. No KiwiCommerce references in code, commits, or any deliverables.
Shopify Plus projects, particularly migrations and Checkout Extensibility builds, go wrong when the scope is not pinned down upfront. We document what is being built, agree the delivery milestones in writing, and fix the timeline before development begins. You know what you are getting and when you are getting it.
From first contact to a certified Shopify Plus developer working on your project, the process is direct. You know the scope, the cost, and the timeline before anything starts.
Tell us what you are building or fixing on Shopify Plus. Whether it is a new checkout build, a B2B configuration, a Scripts migration, a platform migration, or an ongoing development resource, we need to understand the context and complexity. We come back within one business day with an honest assessment and a clear proposal.
For stores currently using Shopify Scripts, we carry out an audit of your existing checkout logic before agreeing on a migration timeline. This maps every Script to a Function equivalent, identifies anything that needs custom development, and gives you a clear picture of what the migration involves, well before the June 2026 deadline. For other Shopify Plus projects, we carry out the relevant pre-project review of your current setup.
Based on your requirements, checkout, B2B, custom app, migration, or ongoing development, we identify the right certified developer from our team. You find out who that person is before work starts. If you want to speak to them first, we can arrange that.
We document what is being built, broken into clear delivery stages, before development begins. Shopify Plus checkout builds are tested in a development store before anything touches your live checkout. Migrations are staged so that go-live involves a tested swap, not a hope. You review and approve each stage.
The job does not end at launch. Shopify updates the platform continuously. Apps need to be maintained. New features need building. Performance needs monitoring. We offer retainer-based support for Shopify Plus stores and currently maintain over 100 live eCommerce stores in that capacity. You have certified continuity rather than starting the search again for every task.
KIWI Commerce redeveloped my entire website, exactly to my requirements. They worked exactly along with my timeframe and were fantastic to work with. I would highly recommend this company. Thank you Sam and the team!
Great response to tickets. We feel our website is in safe hands with Kiwi. Any issues are fixed very quickly. Great value for money. We have been working with Kiwi for a couple of years now and find them very helpful and easy to get along with. Would highly recommend.
Working with Kiwi Commerce has been a very smooth experience. Their team is responsive, knowledgeable, and always willing to go the extra mile. From development to ongoing support, everything is handled efficiently and with great attention to detail. Highly recommended.
We’ve been working with Kiwi Commerce for ongoing website improvements and support, and the experience has been consistently positive. They are proactive, easy to work with, and quick to respond whenever we need assistance. Great team and great service.
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Shopify Plus is the enterprise tier of the Shopify platform. It is available from approximately $2,300 per month and adds a set of features that are either unavailable or significantly restricted on standard plans. The most important differences for development are: Checkout Extensibility and Shopify Functions, which allow full control over the checkout experience, including custom fields, upsell blocks, and dynamic discount and shipping logic. The native B2B suite, which provides company accounts, custom price lists, net payment terms, and PO-based checkout without requiring third-party apps. Up to nine expansion stores at no additional cost, allowing multi-region or multi-brand operation from one organisation. API rate limits are approximately ten times higher than standard plans, which matters significantly for complex ERP and third-party integrations. Standard Shopify is a strong platform for most brands. Shopify Plus becomes the right choice when your business complexity, order volume, or checkout requirements outgrow what standard plans can handle.
Checkout Extensibility is Shopify’s framework for customising the checkout experience on Shopify Plus. It allows developers to add custom UI components, gift message fields, PO number inputs, upsell blocks, custom delivery instructions, and to write backend logic using Shopify Functions that controls how discounts apply, which payment methods are shown to which customer segments, and how shipping options are calculated. On standard Shopify plans, the checkout structure is controlled by Shopify and cannot be modified beyond basic branding. On Shopify Plus, Checkout Extensibility gives merchants complete control over what happens at the most important point in the customer journey.
Shopify Scripts was the original tool for adding custom checkout logic on Shopify Plus. It allowed Ruby-based logic to be applied to discounts, shipping, and payment methods. Shopify replaced it with Shopify Functions, which runs more efficiently and integrates more cleanly with the rest of the platform. Shopify has confirmed that Scripts will stop functioning on 30 June 2026. Any Shopify Plus store with checkout logic built on Scripts discount stacking rules, shipping conditions, and payment method filtering will have that logic break on that date unless it has been rebuilt in Shopify Functions. This is not an optional migration. If your checkout relies on Scripts, the work needs to be planned and completed before that deadline.
Shopify Plus includes a native B2B suite that handles wholesale operations within the same platform as your DTC store. Our Shopify Plus B2B developers configure company accounts with multiple buyers and role-based permissions, build custom price lists and catalogues per company, set up net payment terms such as Net 30 and Net 60 within the checkout, and enable purchase order payment flows. Where the native B2B module does not cover your full wholesale process, for example, advanced quoting or multi-step approval workflows, we build the additional logic through custom Shopify Functions or private app development.
Yes. Migrations to Shopify Plus from Magento, WooCommerce, and other platforms are a regular part of our work. Before starting, we assess your current store’s data structures, custom functionality, and integrations to produce a clear migration plan. Product data, customer data, and order history are migrated with validation. Redirects are mapped and implemented before go-live to protect your search rankings. Custom functionality that exists on the source platform is either rebuilt natively on Shopify Plus or replaced with equivalent App Store solutions or custom apps where necessary.
Yes. We build private and public Shopify Plus apps using Shopify CLI and Shopify’s Polaris design system. Private apps are built for bespoke functionality that your specific business requires but that the App Store does not provide: custom reporting dashboards, bespoke fulfilment logic, unique customer account tools, or deeply integrated workflow automation. Where something can be handled by an existing App Store solution without compromising quality or creating technical dependencies, we recommend that route instead.
We offer retainer-based support covering App Store app updates, custom code maintenance, performance monitoring, new feature development, and Shopify platform update management. Currently, we support over 100 live eCommerce stores on retainers. Shopify Plus is a platform that updates continuously. Having a certified team that knows your store and looks after it is significantly more efficient than bringing in a new developer every time something needs attention.
Our UK-based Shopify Experts team is ready to look at your project. Whether you are building new Checkout Extensibility, migrating from Scripts, setting up B2B, or need an ongoing Shopify Plus development resource, get in touch today. We respond within one business day.
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