Shopify API & App Development Shopify apps and integrations that pass App Store review — or run as private apps.
Custom Shopify apps and private API integrations to extend your store capabilities. Delivered by our Custom Ecommerce Tools team in 3 to 10 weeks. USD pricing.
Part of our Custom Ecommerce Tools practice — see related capabilities below.
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Who we've built for.
How we work
- Focus
- Shopify API & App Development
- Stack
- Amazon SP-API · Shopify Admin API · Node.js · PostgreSQL · Redis · AWS Lambda · EventBridge
- Integrations
- Amazon · Shopify · Walmart · eBay · NetSuite · Xero · QuickBooks · 3PL WMS systems
- Typical timeline
- 3 to 10 weeks
- Compliance
- Amazon SP-API compliance · PCI-aware payment flows · GDPR for EU storefronts
We build Shopify apps and private API integrations: custom checkout extensions, admin tools, inventory sync, and revenue recovery. GraphQL Admin API, webhook reliability, and App Store submission handled.
Recent ecommerce builds
From 24-hour data delays to 15-minute real-time analytics for 500+ Amazon sellers
Read case study →
1.6B EAN product API, Next.js dashboard, Amazon/Walmart Chrome extension with Keepa charts
Read case study →
App Store-approved Shopify app, abandoned cart dashboard, revenue calculator & email automation
Read case study →
Amazon competitor price graphs per listing, pattern insights & Gemini AI forecasts for proactive repricing
Read case study →What we deliver — Shopify API & App
Public Shopify apps
App Store listing, OAuth, billing API, and review-compliant UX.
Private app integrations
Custom admin panels and automation for single-merchant Shopify Plus stores.
Checkout and cart extensions
Upsells, custom fields, and post-purchase flows on Shopify Checkout.
Inventory and ERP sync
Bi-directional sync with NetSuite, Xero, and custom WMS systems.
Revenue recovery tools
Abandoned cart, back-in-stock, and subscription retention apps.
Shopify Plus customizations
Scripts, Flow automation, and multi-store management for enterprise merchants.
Capability detail: Custom Ecommerce Tools, Amazon SP API Development, Marketplace Connectors, Inventory & Order Automation.
Typical engagement ranges
Single-channel tool
From $4,000
- One marketplace or store integration.
- Reporting or automation scope.
- Typical 3 to 5 weeks.
Multi-channel connector
From $9,500
- Inventory and order sync across channels.
- Error handling and monitoring.
- Typical 5 to 8 weeks.
Commerce platform build
From $21,000
- Custom ops dashboard or SaaS tool.
- Multiple integrations and roles.
- Typical 8 to 14 weeks.
FAQ
Public apps reach many merchants and require App Store review. Private apps ship faster for single-brand or Plus merchant needs.
Yes — listing copy, screenshots, privacy policy, and review response included for public app builds.
Yes — multi-channel inventory and order sync is a core specialty. See our marketplace connector work.
GraphQL Admin API for new builds. REST only where legacy endpoints are required.