Shopify Functions
Shopify Functions Development
We build custom Shopify Functions for discounts, payment and delivery customization, cart validation and more, replacing legacy Scripts with fast, supported logic.
Shopify Functions are where the real logic lives. When the native settings cannot express your promotion, your shipping rules or your payment logic, a Function can, and because it runs on Shopify’s own infrastructure, it stays fast and reliable under load.
The logic behind the storefront
Functions are code, and writing them well takes engineering judgement: handling edge cases, keeping them performant within Shopify’s limits, and making them configurable so your team controls the rules without a redeploy. We have built this exact class of logic across our own Shopify apps, so we know where the sharp edges are.
What we build most
Discount Functions for tiered, volume and conditional promotions. Payment and delivery customization to hide, rename and reorder methods per order. Cart and checkout validation to enforce minimums, limits and restrictions. Bundling and pricing logic that native features cannot reach.
Off Scripts, onto Functions
Checkout Scripts are being retired. If you still depend on them, that logic has to move. We audit what you run today and rebuild it as Functions, tested against real carts, so the switch is invisible to your customers.
What we build
Discount Functions
Complex promotions, tiered and volume pricing, and rules that go beyond native discounts.
Payment and delivery customization
Hide, rename and reorder payment and shipping methods based on cart, customer or address.
Cart and checkout validation
Block or warn on carts that break your rules, from minimums to restricted products.
Scripts migration
Move existing Checkout Scripts to Functions before the platform retires them.
Questions, answered
- What are Shopify Functions?
- Functions let you customize Shopify's back-end logic, such as discounts, payment methods, delivery options and cart validation. They run on Shopify's infrastructure and are the supported replacement for Checkout Scripts.
- Can Functions hide or reorder payment methods?
- Yes. Payment customization is a core Function type. We can hide, rename or reorder payment and delivery methods based on the cart, customer or shipping address.
- We still use Checkout Scripts. Do we need to migrate?
- Yes. Shopify is retiring Checkout Scripts, and Functions are the replacement. We audit your Scripts and rebuild the logic as Functions so nothing breaks at cutover.
Ready to build a store worth talking about?
Tell us where your store is today and where you want it to go. We reply within two working days with a clear next step.