I will build custom shopify apps and API integrations

K
katerine_m1
K
katerine_m1
Katerine Mason
build custom shopify apps and API integrations
Full Screen
build custom shopify apps and API integrations
Full Screen
build custom shopify apps and API integrationsbuild custom shopify apps and API integrations

About this gig

Need a custom Shopify app or API integration for your store?

I will build custom Shopify apps, connect Shopify with external platforms, and develop API solutions for your needs.

I work with Shopify GraphQL API, app authentication, webhooks, custom app functionality, and third-party API integrations.


WHAT I CAN BUILD:

  • Custom Shopify apps
  • Shopify GraphQL API integration
  • Third-party API integration
  • Shopify webhook integration
  • Product & inventory sync
  • Order & customer data integration
  • Custom Shopify workflows
  • API troubleshooting & fixes
  • Shopify automation


I can connect Shopify with CRM, ERP, inventory, fulfillment, marketplace, payment, database, and other business platforms through APIs.


CUSTOM APP SERVICES:

  • Custom Shopify app development
  • Product & order automation
  • Custom dashboards
  • Webhook-based workflows
  • API authentication
  • API INTEGRATION:
  • REST & GraphQL APIs
  • Webhook connections
  • Data synchronization
  • API debugging
  • Existing integration fixes
  • Secure API connections
  • Custom data workflows


I can review integrations and identify API issues before development. Yes.

Send your project details, API documentation, or workflow before ordering so I can confirm the right solution.

  • Programming language

    • JavaScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Frontend framework

    • Bootstrap
    • jQuery
    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Express.js
    • Next.js
    • Node.js
    • Supabase
    • Firebase

Get to know Katerine Mason

Katerine Mason

Shopify Custom App and API Integration

  • FromUnited Kingdom
  • Member sinceSep 2026
  • Avg. response time1 hour

  • Languages

    English
I’m a Shopify developer specializing in custom Shopify apps, API integration, automation, and store functionality. I help Shopify merchants connect their stores with third-party platforms, build custom features, automate workflows, and manage store data through Shopify APIs. I work with GraphQL, webhooks, custom apps, external APIs, and Shopify integrations to create solutions that fit your business needs. Whether you need a new app, API connection, data sync, or custom Shopify functionality, I can help turn your requirements into a reliable solution.

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