Badge Select whtSmall
Book a call

Custom app development

Shopify integration services in the USA: ERP, CRM and API work the App Store can’t do.

Internal-use apps, headless storefronts, ERP and CRM integrations, payment gateway customization, AR/3D model integration, and the webhook architecture that connects your Shopify store to whatever else runs your business.

Book a call See case studies

Shopify Plus PartnerShopify Select Partner5.0 on Shopify Partners · Premier Verified on Clutch

In detail

What we actually build

App Store apps cover 80% of needs. The other 20% is where most brands hit a wall, and where custom app development pays for itself within months.

  1. Internal-use Shopify Apps (private, custom-built, single-tenant)

  2. ERP integrations

    NetSuite, SAP, Microsoft Dynamics, Sage

  3. CRM integrations

    HubSpot, Salesforce, Pipedrive, custom

  4. Payment gateway customization

    beyond Shopify Payments and Stripe defaults

  5. Webhook architecture

    real-time data sync to external systems

  6. Headless storefronts

    Hydrogen, Next.js, custom

  7. 3D models and AR integration

    for product visualization

Process

How the work runs, step by step.

Step 01

Technical call

Technical scoping call (free with discovery)

01
02
Step 02

SOW

SOW with fixed-price and timeline

Step 03

Architecture phase

system design, data flow, security review

03
04
Step 04

Build phase

4–12 weeks depending on scope

Step 05

Testing and QA

including data integrity and security

05
06
Step 06

Launch

Launch + 60-day support

Step 07

Maintenance

Maintenance retainer (optional)

07

Start a project

Got a project in your mind?

Tell us what the store needs to do. A senior engineer replies with a scoped answer, not a sales deck.

Proof

Integrations and apps, live on client stores.

Each one is in a published case study, with the full scope and stack.

Gene JuarezSalons and spas, 13 locations, Washington

Zenoti booking and server-side tracking, built into Shopify Plus.

Every Book Now deep-links to the right Zenoti service or location, and a GTM server container reports each booking to GA4, Meta’s Conversions API and Google Ads.

  • Zenoti integration
  • GTM server container
  • Meta Conversions API
Landing page to Zenoti booking
< 1 s
Engineering tickets for campaigns
0
Locations on one editable theme
13

Read the Gene Juarez case study

CocoLashDIY lash extensions, online and in store

A private AI image studio for the brand’s campaigns.

A Next.js app on Supabase and Gemini gives the team on-brand product and lifestyle images on demand, by style and skin tone, with the logo already placed.

  • Next.js app
  • Supabase
  • Gemini image generation
On a monthly retainer
3 yrs

Read the CocoLash case study

FAQs

Do you build public Shopify Apps for the App Store?

Sometimes. Public app development is a different beast, different review process, different pricing model, different ongoing maintenance load. We focus mainly on private and custom apps.

What about Hydrogen and headless?

Yes , we build Hydrogen storefronts and Next.js-based headless setups. We'll also tell you honestly when headless is the wrong call. Most brands don't need it.

How do you handle API rate limits and webhook reliability?

Properly architected. Bulk operations use Shopify's GraphQL Admin API with cursor pagination. Webhooks have retry logic and dead-letter queues. We build for the failure modes, not just the happy path.

Shopify Plus experts

Let's talk Shopify, Shopify Plus and the store you actually want.

An accredited Shopify Plus agency that designs, builds, migrates, supports and grows stores for brands that have outgrown templates. Ready when you are: talk to an engineer about the project.

Get in touch