Custom Shopify App Development & Integrations

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The e-commerce platform for modern brands.

Custom development for Shopify

Shopify

E-commerce

4–8 weeks

OAuth 2.0, API Key

REST

Custom Shopify apps and integrations for e-commerce brands. Custom checkout experiences, inventory sync, subscription flows, and mobile companion apps.

Scope a build

What we build

THE QUICK TAKE

Fixed scope · No hourly billing

Bolder Apps builds custom Shopify apps, private apps, and platform integrations for e-commerce brands and DTC operators. Common builds include custom checkout flows, inventory sync with external systems, and subscription billing. Typical builds range from $25K to $65K and ship in 4 to 8 weeks.

The kinds of things operators ask us to ship.

No fluff. These are real builds we've shipped — or builds the next McLeod,
CoVair, or PocketBoss has on their roadmap.

Custom App

Shopify Custom App

Custom Shopify apps built in Node.js or Remix — private apps, public apps, and embedded admin apps that extend what the default Shopify admin can't handle.

Integration

Shopify ERP Integration

Sync Shopify with your ERP, warehouse management system, or fulfillment platform. Real-time inventory updates, order sync, and automated fulfillment triggers.

Checkout

Shopify Checkout Extension

Custom checkout extensions and post-purchase flows built on Shopify's Checkout Extensibility API — for brands that need more than the standard Shopify checkout.

Mobile App

Shopify Mobile App

Mobile companion apps for Shopify merchants — customer-facing apps, loyalty programs, or branded shopping experiences that extend beyond the Shopify storefront.

Typical project range

$25K–$65K

Fixed-scope. No hourly billing. We quote it upfront andwe ship it.

Typical timeline

4–8 weeks

Discovery in week one. First builds shipping by weekthree. Production ready inside the quarter.

Three circular progress bars showing 86%, 65%, and 40% completion with corresponding user and interaction icons inside each circle.

API Type

REST

Authentication

OAuth 2.0, API Key

Documentation

shopify.dev

The conversations that bring buyers here.

Wholesale App

We need a custom Shopify app that handles our wholesale ordering flow. The standard admin doesn't support what we need.

Warehouse Sync

Our Shopify orders need to sync automatically with our 3PL warehouse system. Right now we're doing it manually every day.

Branded Mobile App

We want a branded mobile app for our Shopify store that includes loyalty points and push notifications.

Custom Checkout Logic

Our checkout needs custom logic for volume discounts and bundle pricing that Shopify's native tools can't handle.

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Builds we've shipped for construction operators.

Joe & The Juice

A modern mobile app that streamlines ordering and elevates the overall brand experience.

Joe & The Juice

Retail

Fanbase

A creator-first social platform where users publish and monetize content without ads or limits.

Fanbase

Social Media

Urban

A seamless booking app for scheduling trusted massage therapists with secure payments.

Urban

On-Demand

More projects

Attentiveness to detail and excellent design skills are impressive.

Steve Anavi

Senior Manager, Qonto

They truly understood our vision and translated it into a polished product with a seamless UX.

Anna Haberfellner

Senior SDR, Rydoo

They moved the project very smoothly.

Len Swegart

Senior Corporate Relations Manager, American Cancer Society

The integration your team keeps asking for.

Fixed scope. Fixed price. Ships in weeks.

Build Bolder

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Bold Answers to Bolder Questions.

Can't find what you're looking for? Get in touch with our team.

Can you build a custom Shopify app?

Yes. We build custom Shopify apps, private apps, and integrations for e-commerce brands and DTC operators. Common builds include custom checkout experiences, inventory sync with external systems, subscription flows, and integrations with fulfillment or field service platforms.

How long does a custom Shopify app take to build?

Most Shopify custom app projects ship in 4 to 8 weeks. A private admin app with a focused integration — say, syncing Shopify orders to an ERP — sits at the lower end. A public Shopify app with a full storefront extension, custom checkout logic, and mobile companion sits higher.

Can you sync Shopify with our ERP or warehouse system?

Yes. We build custom Shopify apps that sync with ERPs, warehouse management systems, and fulfillment platforms. Common builds include real-time inventory sync between Shopify and NetSuite or custom WMS tools, automated order routing to third-party fulfillment, and custom product catalog management apps.

Do you build headless Shopify storefronts?

Yes. We build headless Shopify storefronts using Shopify's Hydrogen framework — for brands that need full control over the frontend experience beyond what standard Shopify themes allow. Common use cases include custom product configurators, B2B portals, and high-performance storefronts with complex filtering.

Let's discuss your goals

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They moved the project very smoothly.

Len Swegart

Senior Corporate Relations Manager, American Cancer Society

They truly understood our vision and translated it into a polished product with a seamless UX.

Anna Haberfellner

Senior SDR, Rydoo

Attentiveness to detail and excellent design skills are impressive.

Steve Anavi

Senior Manager, Qonto

Can’t find what you’re looking for? Chat with our friendly team!

Custom development for Shopify

The kinds of things operators ask us to ship.

The conversations that bring buyers here.

Builds we've shipped for construction operators.

Joe & The Juice

Fanbase

Urban

Attentiveness to detail and excellent design skills are impressive.

They truly understood our vision and translated it into a polished product with a seamless UX.

They moved the project very smoothly.

The integration your team keeps asking for.

Bold Answers to Bolder Questions.

Other tools we build with

Stripe

QuickBooks

ServiceTitan

Let's discuss your goals