Skip to content
Nextryzer Technologies

Extend Shopify beyond what themes allow

Shopify App & API Development

We build custom Shopify apps, private integrations, and Shopify Functions that add the commerce logic your store needs without stacking third-party apps that tax performance.

Discuss Your Project Explore capabilities
Developers building a custom embedded Shopify app and Admin API integration for a merchant
Custom embedded Shopify appsShopify Functions and checkout extensibilityAdmin, Storefront, and webhook integration

The business problem

When the current way of working becomes the constraint.

01

The store needs logic no existing Shopify app provides.

02

Installed apps overlap, conflict, and slow the storefront.

03

Shopify data must sync with an ERP, PIM, or fulfilment system in real time.

What we deliver

Shopify App & API Development, built as a complete capability.

Strategy, experience, engineering, and operational readiness stay connected from the first decision through production.

Developers building a custom embedded Shopify app and Admin API integration for a merchant

Custom embedded Shopify apps

Delivered with clear acceptance criteria, maintainable implementation, and visible business context.

Shopify order and inventory data staying in sync with back-office systems through a custom app

Shopify Functions and checkout extensibility

Delivered with clear acceptance criteria, maintainable implementation, and visible business context.

Commerce specialists preparing products, imagery, collections, and merchandising for a Shopify store

Admin, Storefront, and webhook integration

Delivered with clear acceptance criteria, maintainable implementation, and visible business context.

Integration architecture connecting a storefront with ERP, PIM, marketplaces, and fulfilment systems

Private app and data-sync builds

Delivered with clear acceptance criteria, maintainable implementation, and visible business context.

Polaris-native admin UI
Checkout and discount logic
Reliable webhook processing
App Store submission support

Delivery path

Progress stays visible at every stage.

01

Define the commerce gap

Establish the business context, constraints, and success measures for shopify app & api development.

Visible progressNext stage →
02

Design the app and data flow

Turn evidence into a focused experience and technical plan for get the exact commerce behavior you need on shopify, cleanly, without a pile of apps slowing the storefront.

Visible progressNext stage →
03

Build on Shopify APIs

Deliver custom embedded shopify apps and shopify functions and checkout extensibility in visible, testable increments.

Visible progressNext stage →
04

Test, submit, and support

Measure adoption and quality, then evolve the shopify app & api development roadmap.

Visible progressReady to scale

Technology

A stack selected for the service - not for fashion.

ShopifyGraphQLRemixNode.jsTypeScriptAWS

Common use cases

Custom pricing, bundling, or subscription logic at checkout
Two-way sync between Shopify and an ERP or 3PL
A private merchant app for internal store operations

Business value

What better looks like.

Shopify order and inventory data staying in sync with back-office systems through a custom app

Store behavior matches the business instead of the nearest available app

OUTCOME / 01

Fewer third-party apps means a faster, more stable storefront

OUTCOME / 02

Shopify and back-office systems agree on inventory, orders, and pricing

OUTCOME / 03

Apps built to Shopify's standards pass review and survive platform updates

OUTCOME / 04

Relevant industries

Experience where context matters.

EcommerceRetailFitnessHospitality

Related solutions

Ecommerce PlatformInventory Management SystemPOS System

Frequently asked

Public app or custom app?
A custom, merchant-specific app is right when the functionality is for your store alone. A public app makes sense if you intend to distribute it to other merchants. We build and submit both.
Can you replace several paid apps with one custom build?
Often, yes - especially when each paid app does one small thing and their combined subscription and performance cost is high. We assess the trade-off honestly before recommending a build.
Do you work with Shopify Plus and checkout extensibility?
Yes. We use Shopify Functions, checkout UI extensions, and Plus capabilities such as scripts migration and B2B where they apply.
How does this relate to your Shopify Development service?
Shopify Development covers the storefront, theme, and store build. This service covers custom apps and API integrations that extend Shopify's logic and connect it to other systems.

Related capabilities

Build the complete solution.

All services
Commerce specialists preparing products, imagery, collections, and merchandising for a Shopify store

Shopify Development

We create distinctive Shopify stores and extensions that improve buying while keeping operations manageable.

Explore service
Integration architecture connecting a storefront with ERP, PIM, marketplaces, and fulfilment systems

Ecommerce Integration

We connect storefronts, marketplaces, ERP, PIM, payment, and fulfilment systems so catalogue, inventory, orders, and customer data stay consistent everywhere.

Explore service
Ecommerce team reviewing a custom storefront and purchase journey across desktop and mobile devices

Ecommerce Development

We engineer conversion-focused commerce experiences connected to the systems that make reliable selling possible.

Explore service

Start with the outcome

Let’s make shopify app & api development create real business value.

Tell us what needs to change. We’ll help define the right scope, architecture, and delivery path.

Discuss Your Project

Shopify App & API Development

Get the exact commerce behavior you need on Shopify, cleanly, without a pile of apps slowing the storefront.

Scope → architecture → delivery

Custom embedded Shopify apps

Shopify Functions and checkout extensibility

Admin, Storefront, and webhook integration

Private app and data-sync builds

Define the commerce gap → Design the app and data flow → Build on Shopify APIs → Test, submit, and support