Shopify App Bridge · Node / Remix · Functions

Custom Shopify App Development Company

Q: What is the difference between a public app and a custom private app?

A public app is hosted by a third-party developer for thousands of stores, charging recurring monthly subscription fees and requiring generalist settings. A custom private app is built exclusively for your store, tailored 100% to your unique business logic, hosted under your control, and incurs zero monthly app developer fees.

Q: Where is our custom Shopify app hosted, and what are the server costs?

We host your private app on lightweight, serverless cloud platforms like AWS, Fly.io, or Render. Because modern Shopify apps rely on Shopify Functions for checkout execution, backend compute requirements are tiny — typical hosting costs are under $10–$25 per month.

Q: What happens when Shopify updates their Admin API versions?

Shopify operates on a predictable quarterly API release cycle, supporting each version for 12 months. All our apps are built on the latest stable GraphQL APIs with modular architecture, making annual version migrations simple and fast.

Q: Can a custom app handle real-time inventory and ERP sync with NetSuite or SAP?

Yes. We frequently build custom integration apps that listen to Shopify webhooks (orders created, inventory adjusted, refunds) and sync bidirectionally with external ERPs, WMS systems, and proprietary databases via REST or GraphQL.

Q: Do we own the full source code of the app?

Yes. You receive 100% intellectual property ownership of the source code, database architecture, and deployment pipelines. Everything is pushed directly to your organization's private GitHub repository.

Bespoke private and embedded Shopify apps, custom B2B pricing engines, and product bundle builders built with zero recurring SaaS fees.

Discuss Your App Requirements →Request an Architecture Estimate

✓ Overlapping US (EST) & UK (GMT) sprint hours✓ 100% Code ownership & clean GitHub handover✓ Fixed-scope & fixed-price quotation

Custom Shopify App Development Company Architecture Blueprint

THE APP STORE TRAP

Why off-the-shelf Shopify apps hold enterprise brands back

Public apps from the Shopify App Store charge hundreds of dollars in recurring monthly fees, inject heavy frontend script tags that slow down your store, and force you to compromise your unique business workflows.

⚠ $15k–$30k/yr in app fees

Runaway Monthly SaaS Subscriptions

Paying $200–$800/month across multiple apps for bundles, tiered pricing, and custom fields adds up to tens of thousands in recurring overhead.

⚠ 300KB+ unnecessary JS

Storefront Script Bloat & Slowdowns

Each third-party app injects external JS tags and stylesheets, creating script conflicts and ballooning page weight.

⚠ Compromised customer UX

Rigid Workflows & Unsupported Business Logic

Public apps cannot accommodate specialized B2B customer tiers, custom ERP inventory allocations, or unique bundle pricing structures.

OUR ENGINEERING CAPABILITIES

Custom embedded apps built with Remix, Polaris, and Shopify Functions

We build private Shopify apps that integrate directly into the Shopify Admin using Shopify Polaris and App Bridge. For checkout and storefront logic, we leverage serverless Shopify Functions written in Rust and TypeScript for native execution with zero storefront script lag.

✓Embedded Admin UI using official Shopify Polaris design system for a completely native merchant experience.

✓Shopify Functions (Discounts, Payment Customization, Cart Validation) executing server-side within Shopify's infrastructure in <5ms.

✓Secure backend microservices built with Remix, Node.js, TypeScript, and Prisma ORM deployed to AWS or Fly.io.

✓Real-time webhook and GraphQL Admin API synchronization with external ERPs (NetSuite, SAP), CRMs, and 3PL fulfillment systems.

VERIFIED TECH STACK

Remix & Node.js

Backend & Webhooks

Full-stack modern framework for Shopify app development

Shopify Functions

Checkout Logic

WASM-compiled server-side native checkout execution

Polaris & App Bridge

Admin UI

Native Shopify Admin design system and controls

Prisma & PostgreSQL

Database & Storage

Encrypted, high-performance relational data store

PROVEN RESULTS · BEVERAGE & DTC · US MARKET

Custom Mix-and-Match bundle app replaced 3 paid SaaS plugins, saving $14,000/yr and lifting average order value by +31%

This brand was paying $1,200/mo for a suite of clunky bundle and discount apps that broke whenever Shopify updated checkout. We engineered a bespoke private bundle app with native Shopify Functions, providing a seamless builder interface and reducing cart abandonment.

Artisan Spirits & Co. Production Storefront by Devan Labs

$14k/yr

SAVED IN APP FEES

+31%

AOV LIFT VIA BUNDLES

<5ms

CHECKOUT LOGIC TIME

0KB

STOREFRONT SCRIPT OVERHEAD

“The custom bundle builder paid for itself within two months. It works directly inside Shopify Admin, never slows down our site, and we no longer pay recurring monthly app bills.”

— David Vance, COO, Artisan Spirits

WHAT YOU GET

Engineering deliverables checklist

Every engagement includes fixed scope, clear milestone verification, and direct engineer access with zero junior account managers in between.

✓

Technical Specification & API Architecture

Data flow diagrams, database schemas, and Shopify API endpoint mapping.

Week 1

✓

Shopify Polaris Admin Dashboard

Native admin UI for configuring rules, bundle tiers, and business settings.

Weeks 2–3

✓

Shopify Functions & Checkout Integration

WASM-compiled discount rules, delivery customizations, and cart validations.

Weeks 3–4

✓

Secure Serverless Cloud Deployment

Hosting configuration on AWS / Fly.io with automated database backups and SSL.

Week 4

✓

Complete Source Code Handover

Full repository ownership, documentation, and automated deployment scripts.

Week 5

✓

API Version Update Guarantee

6 months of proactive Shopify API version compatibility updates included.

6 Months

TECHNICAL FAQS

Frequently asked questions

Specific answers to common technical, timeline, and architectural questions from US and UK ecommerce directors.

What is the difference between a public app and a custom private app?+

A public app is hosted by a third-party developer for thousands of stores, charging recurring monthly subscription fees and requiring generalist settings. A custom private app is built exclusively for your store, tailored 100% to your unique business logic, hosted under your control, and incurs zero monthly app developer fees.

Where is our custom Shopify app hosted, and what are the server costs?+

We host your private app on lightweight, serverless cloud platforms like AWS, Fly.io, or Render. Because modern Shopify apps rely on Shopify Functions for checkout execution, backend compute requirements are tiny — typical hosting costs are under $10–$25 per month.

What happens when Shopify updates their Admin API versions?+

Shopify operates on a predictable quarterly API release cycle, supporting each version for 12 months. All our apps are built on the latest stable GraphQL APIs with modular architecture, making annual version migrations simple and fast.

Can a custom app handle real-time inventory and ERP sync with NetSuite or SAP?+

Yes. We frequently build custom integration apps that listen to Shopify webhooks (orders created, inventory adjusted, refunds) and sync bidirectionally with external ERPs, WMS systems, and proprietary databases via REST or GraphQL.

Do we own the full source code of the app?+

Yes. You receive 100% intellectual property ownership of the source code, database architecture, and deployment pipelines. Everything is pushed directly to your organization's private GitHub repository.

RECOMMENDED DEEP DIVE ARCHITECTURE GUIDE

Read our in-depth technical playbook

Learn how our engineers tackle real-world Shopify performance, data migration, and architecture constraints.

Read Technical Guide →

RAPID 3-DAY TURNAROUND · NO OBLIGATION

Let's audit your store architecture

Book an architecture call or send your store URL for a free 40-point technical code, speed, and conversion audit. Delivered in 3 business days.

Discuss Your App Requirements Request an Architecture Estimate