Shopify Functions

Shopify Functions for cart and checkout logic that belongs server-side

Some rules should not rely on theme JavaScript alone. Shopify Functions run close to checkout for discount, cart and delivery logic on supported plans. NP SoftTech develops Functions when your requirements fit the platform capabilities.

Discuss Shopify Functions View our work

Shopify Partner

We are a Shopify Partner

Store builds, redesigns, custom features and ongoing support delivered as an official Shopify Partner, with development stores created from our Partner dashboard when we lead the build.

Shopify Partner details

Fit

Who this is for

Merchants with complex discount rules beyond native Shopify discounts
Brands needing cart validation before checkout completes
Stores on plans that support Shopify Functions
Teams replacing fragile checkout scripts with supported Function logic

Signals

Common problems we solve

Discount apps conflict with each other or slow checkout
Cart rules enforced in JavaScript can be bypassed or break on mobile
Delivery or payment customisation needs plan-appropriate tooling
Marketing wants promotions that standard discount codes cannot express
Previous custom checkout scripts broke after Shopify updates

Scope

What NP SoftTech delivers

Practical Shopify work tied to how you sell, not a generic theme install.

Review requirements against Shopify Function types available on your plan
Develop discount, cart, delivery or payment Functions as applicable
Test edge cases stacked discounts, international carts, B2B rules
Deploy through Shopify app or extension workflow
Document rules in plain language for your merchandising team
Maintain Functions when Shopify API versions change

Delivery

How a project moves

Clear stages so you always know what happens next.

Stage 01/06

Start with a project brief

Stage 01
Rule workshop
inputs, outputs and exceptions
Stage 02
Confirm plan support and Function type fit
Stage 03
Prototype on development store
Stage 04
Test with representative carts and customer segments
Stage 05
Production release with monitoring
Stage 06
Handover documentation

Handover

Deliverables

Deployed Shopify Function code
Test cases covered
Merchant-facing explanation of rules
Upgrade notes when Shopify deprecates API versions

Capability

Technical tools we use

Only where they solve a real store need.

Shopify Functions API
Discount, cart, delivery and payment Function targets
Shopify CLI and app deployment pipeline
Rust or JavaScript Function runtimes as required by Shopify

Investment

Packages for custom Shopify work

Build, Advanced, or a scoped Custom quote.

Most chosen

Build

Custom sections and store features

Starting from ₹59,999 + GST

Custom Shopify sections when needed
Feature work on product, cart or account flows
Growth minded UX guidance
Staging review before release

Choose Build

Advanced

Deeper custom work and integrations

Starting from ₹1,20,000 + GST

Larger custom feature or multi-template work
Apps, APIs and system connections when needed
Error handling and ownership notes
Staging review and release plan

Choose Advanced

Custom

Scoped to your exact requirements

Custom quotation Talk to us for a scoped quote

Discovery call and written scope
Timeline and milestone plan
Clear ownership after handover
Optional monthly care afterwards

Request a quote

Final pricing depends on scope. India sees INR. Other regions see USD.

FAQ

Questions brands ask before we start

Straight answers on scope, themes, integrations and plans.

Clear Shopify scope
Brands and agencies
Written next step

Still unsure? Send a brief More Shopify FAQs

Do Functions work on all Shopify plans?

No. Availability depends on your Shopify plan and the Function type needed. We confirm during scoping before quoting.

Functions or theme JavaScript?

Use Functions when rules must be enforced reliably at cart or checkout. Use theme code for display and UX. We often combine both.

Can Functions replace my discount app?

Sometimes, if your rules fit Function limits. Complex promotion suites may still need apps or a hybrid approach.

Describe your Shopify Functions requirement

Explain the cart, discount or checkout rule you need and your Shopify plan if known.

About you
Project
Details

Step 1 of 3: About you

About you

First name *

Last name

Business / brand name

Email *

Phone / WhatsApp *

Country *

About the project

Website / store URL

Current platform

Shopify plan (if known)

Project type *

Budget range Helps us propose a realistic scope.

Timeline

Details

Main problem or goal *

Requirements / additional details

We are a good fit for thoughtful Shopify development, custom functionality and ongoing technical support. This form sends a project inquiry, not a marketing subscription.

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