Custom theme development
Online Store 2.0 themes built from your design system, with sections and blocks your team can edit without a developer.
Service 01
Shopify Plus Development
Shopify Plus development is the design and engineering of high-volume stores on Shopify’s enterprise plan. FleekApps builds and extends Shopify Plus stores with custom Online Store 2.0 themes, checkout extensibility, Shopify Functions, B2B, Markets and headless Hydrogen storefronts, using the same expertise we put into our own Shopify apps.
01
What’s included
Checkout extensibility
Checkout UI extensions, the branding API, pixels and Shopify Functions, including migrations away from checkout.liquid.
Scripts to Functions migration
Line item, shipping and payment Shopify Scripts rebuilt as Shopify Functions, tested against real carts before cutover.
B2B on Shopify
Company accounts, catalogs, price lists, payment terms, quantity rules and wholesale checkout logic.
Headless with Hydrogen
Hydrogen and Oxygen storefronts when you need full front-end control and app-like speed.
Markets & expansion stores
Shopify Markets, localized catalogs, currencies, domains and expansion stores for new regions.
02
Who it’s for
Brands moving to Plus
You have outgrown a standard plan and need a store, checkout and team workflow built for volume.
Plus stores with tech debt
Old themes, app bloat or Scripts that need to become Functions before they hold you back.
Teams going global or B2B
New markets, wholesale customers or multiple storefronts on one platform.
03
How we work
- 01
Discover
We learn your store, numbers, stack and goals, then agree what success looks like and how we will measure it.
- 02
Design
Flows, interfaces and architecture, reviewed with you before a line of production code is written.
- 03
Build
Short cycles with working previews on a development store, so you see progress every week.
- 04
Launch
QA on real devices and real checkouts, a rollout plan, and monitoring from day one.
- 05
Grow
We measure the result, then iterate: experiments, automations and new features on a monthly rhythm.
04
Tools & platforms
- Shopify Plus
- Liquid
- Online Store 2.0
- Checkout UI extensions
- Shopify Functions
- Hydrogen
- Oxygen
- Shopify Markets
- B2B on Shopify
- Admin GraphQL API
05
Our apps that help
06
FAQ
What is the difference between Shopify and Shopify Plus?
Shopify Plus is Shopify’s plan for high-volume and enterprise merchants. It adds deeper checkout customization, B2B features, expansion stores, automation tools such as Launchpad, and the ability to run custom apps that use Shopify Functions. We help you decide whether Plus is worth it for your volume and roadmap.
Can you migrate our Shopify Scripts to Shopify Functions?
Yes. We map every Script to its Shopify Function equivalent (discount, delivery customization, payment customization or validation), rebuild it, and test it against real carts before switching over. Many Scripts can also be rebuilt without custom code in FunctionFlow AI, our own app.
Do you build headless Shopify stores?
Yes, with Shopify Hydrogen and Oxygen when headless is the right call. For most brands a well-built Online Store 2.0 theme is faster to ship and easier to run, and we will tell you which fits.
How long does a Shopify Plus project take?
It depends on scope. A focused checkout or theme project is usually measured in weeks, while a full replatform takes longer. We agree a timeline and milestones in discovery, before any build starts.
07
Other services
- 01 AI Automations AI agents and workflows for product content, support, merchandising and operations, connected to your Shopify data.
- 02 Conversion Rate Optimization Research, A/B tests and UX improvements across collections, product pages, cart and checkout.
- 03 Custom Apps & Extensions Private and public Shopify apps, Shopify Functions, checkout UI, theme app and admin extensions.
- 04 Enterprise Integrations Reliable, monitored connections between Shopify and your ERP, PIM, OMS, WMS, CRM and accounting systems.
- 05 eCommerce Scaling A technical growth roadmap: performance, peak readiness, international expansion and automation.
Let’s talk about Shopify Plus development.
Tell us about your store and what you want to change. We will come back with questions and a suggested next step.