Shopify Scripts will stop working on 30 June 2026. If your checkout discount logic, payment rules, or shipping conditions run on Scripts, that is a fixed deadline, not a suggestion. KiwiCommerce is an Official Shopify Experts agency. Our dedicated Shopify Plus developers handle Scripts-to-Functions migrations, Checkout Extensibility builds, native B2B configuration, and custom app development. UK-based, verified by Shopify.
Most Shopify Plus builds look fine until Shopify updates something. Checkout Extensibility builds done with workarounds break on platform releases. Discount logic written as a quick fix creates incompatibility the next time Functions gets an update. Our Shopify Plus developers write to platform standards, Shopify CLI, Polaris, and proper Functions architecture so your store stays clean after launch.
Get In TouchEvery build uses Shopify CLI, Polaris standards, and proper Checkout Extensibility architecture, not workarounds that break on the next platform release.
Shopify Scripts end 30 June 2026. We audit your existing Script logic, rebuild it in Functions correctly, and test it against your live checkout.
Official Shopify Experts status means Shopify has assessed our work against their own standards. Not self-declared verified, and on record with the platform.
We know which App Store solutions are worth using and where a custom private app is the better call. That distinction saves budget and reduces technical debt.
Shopify Plus is a different platform from standard Shopify in ways that matter for development. Checkout Extensibility gives your store complete control over what happens at checkout, custom fields, upsell blocks, discount and payment logic using a sandboxed framework that is now the only supported model. Checkout. The liquid was fully set in August 2025.
The B2B suite handles company accounts, custom price lists, net payment terms, and PO-based checkout natively. For wholesale brands running DTC and trade from one platform, that is the right architecture. Our dedicated Shopify Plus developers have configured and extended these features for manufacturers, distributors, and high-volume trade brands.
The Shopify Scripts deadline is 30 June 2026. Any discount logic, shipping rules, or payment method conditions built on Scripts will break on that date. Our developers are already handling these migrations, auditing existing Script logic, rebuilding it in Shopify Functions, and testing against live checkout flows before the deadline.
With 250+ projects completed since 2016 and over 100 live stores on retainer, we have built and maintained Shopify Plus stores at every complexity level, from DTC brands upgrading to Plus through to enterprise B2B wholesale operations with multi-company accounts structures and ERP integrations.
2+ Experience Years
Builds custom checkout UI components, upsell blocks, and additional input fields, and validation rules using Shopify's Checkout Extensibility framework. Also handles post-purchase extension builds and checkout-to-order-status page flows. These developers do not use workarounds; they write to Shopify's sandboxed TypeScript and React component model, which means the builds hold up when Shopify pushes platform updates.
5+ Experience Years
Builds the backend logic that controls how your checkout behaves: discount stacking rules, shipping rate calculations, payment method visibility by customer segment, and cart transformations. Functions replaced Shopify Scripts and run as compiled WebAssembly faster and more reliably. For stores migrating off Scripts before June 2026, this developer type leads the rebuild and handles the compatibility testing.
7+ Experience Years
Configures and extends Shopify Plus's native B2B suite: company accounts with role-based permissions, custom price lists per company, net payment terms in checkout, and PO-based order flows. Where the native B2B module does not cover your full wholesale process, complex quoting or multi-step approval workflows, build the additional logic through custom Shopify Functions or private apps.
5+ Experience Years
Builds private and public apps using Shopify CLI and the Polaris design system. Creates functionality the App Store does not provide: custom fulfilment logic, bespoke reporting dashboards, unique customer account tools, and workflow automation. Understands Shopify's app review standards and builds apps that stay compatible with platform updates, not just functional on the day they ship.
5+ Experience Years
Handles migrations to Shopify Plus from Magento, WooCommerce, and other platforms. Before starting, assess data structures, custom functionality, and integration dependencies to produce a migration plan with no surprises mid-project. Product data, customer records, and order history are migrated with validation. Redirects are mapped before go-live to protect search rankings.
7+ Experience Years
For complex Shopify Plus builds or migrations, the decisions made before development starts, determine what gets built correctly versus what gets rebuilt later. These developers assess your current setup or source platform, design the full Shopify Plus architecture app stack, integration layer, checkout structure and lead development through delivery. They decide what to build custom versus source from the App Store, and justify both.
What's Included with Our Shopify Plus Developers
Custom checkout UI components, upsell blocks, PO number fields, delivery instruction inputs, and validation logic all built inside Shopify's sandboxed extensibility framework. Checkout. Liquid has been sunset since August 2025. Every build we deliver runs on the current, supported architecture.
If your checkout logic runs on Shopify Scripts, 30 June 2026 is a hard deadline. We audit every Script in your store, map it to a function equivalent, identify where custom development is needed, and deliver a fully tested replacement before the cutoff.
Company account creation with buyer roles and permissions, custom price lists per company, net payment terms (Net 30, Net 60) built into checkout, and PO-based ordering flows. Extended with custom Functions or private apps where the native B2B module does not reach your full buying workflow.
Private Shopify Plus apps built with Shopify CLI and Polaris for functionality that the App Store does not cover. Custom fulfilment logic, merchant-specific dashboards, bespoke customer account tools, and workflow automation. Built to Shopify's review standards, so they stay compatible as the platform updates.
Migrations to Shopify Plus from Magento, WooCommerce, and standard Shopify. Full data migration with validation of products, customers, and order history. Redirects mapped before go-live. Custom functionality from the source platform is rebuilt natively on Plus or replaced with equivalent App Store solutions where appropriate.
Retainer-based support covering app updates, custom code maintenance, performance monitoring, new feature development, and Shopify platform update management. We currently support over 100 live stores in this capacity. You get a certified team that already knows your store, not a new search every time something needs attention.
Any Shopify agency can say they do Shopify Plus. The differences that matter are certification, how the code is written, and whether the team is reachable when something breaks.
KiwiCommerce holds Official Shopify Experts status, assessed by Shopify against their own standards for technical depth and client delivery. That credential is on record with Shopify. When you hire Shopify Plus development experts from our team, you work with developers whose platform credentials have been formally checked.
Shopify Scripts will stop working on 30 June 2026. We are not preparing for this; we are already doing it. Our developers audit existing Script logic, rebuild it in Shopify Functions, and run it against live checkout flows before the deadline. If your checkout relies on Scripts, this work needs to start now, not next quarter.
There is a meaningful difference between a Shopify Plus build that uses platform tools correctly and one that works through workarounds. Our developers write code that follows Shopify CLI standards, uses Polaris components for app builds, and structures Checkout Extensibility in a way that survives platform releases, not just the day the build ships.
Every developer on your Shopify Plus project is in the UK. When something breaks on your checkout during a sale event, you reach someone who is at their desk. No overnight handoffs. No next-day replies from a different time zone. For live enterprise stores, that availability is not a nice-to-have.
If you have a Shopify Plus client and need a certified resource without adding headcount, we operate as your white-label development partner. Your client sees your brand throughout. Nothing references KiwiCommerce in code, commits, or documentation unless you ask for it. NDAs are signed on every engagement as standard.
Supporting 100+ live eCommerce stores on active retainers is evidence of something specific: clients do not replace us when the build is done. That continuity comes from writing code that is maintainable, from responding when things go wrong, and from knowing a client's store well enough to extend it cleanly over time.
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 Shopify. The meaningful differences for most businesses are: full control over checkout behaviour through Checkout Extensibility and Shopify Functions, a native B2B suite with company accounts and net payment terms, API rate limits roughly ten times higher than standard plans, and up to nine expansion stores at no additional licence cost.
Checkout Extensibility is Shopify’s framework for customising the Plus checkout. It replaced checkout.liquid, which was fully sunset in August 2025. Using UI Extensions and Shopify Functions, developers build custom fields, upsell blocks, discount logic, payment method filtering, and shipping rules inside a sandboxed environment that does not break on platform updates.
Any discount logic, shipping conditions, or payment method rules built on Shopify Scripts will stop functioning entirely on that date.Stores that do not migrate their Script logic to Shopify Functions before the deadline will have broken checkout behaviour on a live trading store. This is not a warning it is a fixed platform cutoff.
Yes. Migrations from Magento, WooCommerce, and standard Shopify are a regular part of our work. Before starting, we assess data structures, custom functionality, and integration dependencies to produce a migration plan with a clear scope. Products, customers, and order history are migrated with validation. Redirects are mapped and live before go-live to protect search rankings.
Shopify Plus includes a native B2B suite: company accounts with buyer roles, custom price lists per company, net payment terms such as Net 30 and Net 60 built into checkout, and purchase order payment flows. Where the native module does not cover your full wholesale process, complex quoting or multi-step approval workflows, we extend it with custom Shopify Functions or private apps.
Yes. We build private apps using Shopify CLI and the Polaris design system for functionality the App Store does not provide: custom fulfilment logic, bespoke reporting dashboards, unique customer account tools, and workflow automation. Where an App Store solution covers the requirement properly, we recommend that route instead of reducing custom code where it is not necessary.
We offer retainer-based support covering app updates, custom code maintenance, performance monitoring, new feature development, and Shopify platform update management. We currently support over 100 live eCommerce stores in this capacity. Shopify updates the platform continuously having a certified team that already knows your store is more efficient than briefing a new developer every time.
Yes. For agencies with Shopify Plus clients, we operate as a white-label development partner under your brand. Your client sees your name throughout the project. Nothing in code, commits, or documentation references KiwiCommerce unless you ask for it. NDAs are signed on every engagement, and we work with multiple agencies in this capacity right now.
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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