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I will develop custom shopify payment app, shopify cli app, admin API, storefront API
Emmanuel A
About this gig
Are you looking for an experienced Shopify developer to build a custom Shopify Payment App, Public App, Private App, or integrate the Shopify Admin API, Storefront API, or Shopify CLI?
You're in the right place.
I develop modern Shopify applications using the latest Shopify development stack to automate workflows, extend store functionality, connect third-party services, and create seamless payment experiences.
Whether you're launching a Shopify SaaS, marketplace, ERP integration, or custom checkout workflow, I'll deliver clean, scalable code that follows Shopify's latest development standards.
Services I Offer
- Shopify App Development
- Custom Shopify App
- Public Shopify App
- Private Shopify App
- Embedded Shopify Apps
- Shopify CLI Development
- Shopify Polaris UI
- Shopify App Bridge
- OAuth Authentication
- App Extensions
- Theme App Extensions
- Checkout UI
Shopify API Development
- Shopify Admin API
- Shopify Storefront API
- GraphQL API
- REST API
- Webhooks
- Metaobjects
- Metafields
- Customer API
- Inventory API
- Orders API
- Product API
- Cart API
- Checkout API
- Subscription Payments
- Split Payments
- Wallet Integration
- Crypto Payments
- Payment Status Webhook
- Refund Automation
- Payment Verification
CONTACT ME NOW
Respect third-party rights
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Get to know Emmanuel A
Emmanuel A
Full Stack Developer, Shopify App Expert, Nextjs, Nodejs, Flutter, AI Automation
- FromCanada
- Member sinceMay 2025
- Avg. response time1 hour
Languages
English, Chinese, Dutch, Luxembourgish, Japanese, Greek, Spanish, Bulgarian, Arabic, German, French
I'm a Full Stack Developer specializing in Mobile Apps, Shopify App Development, AI Automation, and Cloud Deployment. I help startups, agencies, and businesses build scalable, high-performance applications with clean, maintainable code.
I build custom Shopify payment apps, Shopify CLI apps, Admin API, Storefront API, GraphQL integrations, mobile apps, and scalable web applications. Experienced with Docker, Firebase, Vercel, AWS, VPS, REST APIs, and OpenAI.
I deliver secure, high-performance, production-ready solutions with clean code and reliable support.
Contact me now.
My Portfolio
FAQ
Can you build a custom Shopify Payment App?
Yes. I can develop custom payment applications, integrate supported payment providers, implement secure payment flows, webhook handling, transaction verification, refunds, and payment automation.
Do you build both Public and Private Shopify Apps?
Yes. I develop: Public Apps Private Apps Custom Apps Embedded Apps Shopify Plus Apps depending on your business requirements.
Can you integrate Shopify Admin API and Storefront API?
Absolutely. I work extensively with: Shopify Admin API Storefront API GraphQL REST API Webhooks Metaobjects Metafields
Can you migrate an old Shopify app to the latest Shopify CLI?
Yes. I can upgrade legacy Shopify apps to the latest Shopify CLI architecture using modern best practices and current Shopify development standards.
Which payment gateways can you integrate?
I can integrate many providers including Stripe, PayPal, Paystack, Flutterwave, Razorpay, Square, Klarna, Afterpay, Wise, Authorize.net, and other supported payment services.
Can you connect Shopify with external systems?
Yes. I integrate Shopify with: ERP CRM Accounting Software Inventory Systems Shipping Providers Marketing Platforms Custom APIs
Do you use GraphQL or REST?
Both. Whenever appropriate, I prioritize Shopify GraphQL APIs for better performance while using REST endpoints where they are still required.
Can you fix Shopify app bugs?
Yes. I troubleshoot: OAuth errors API failures Webhook issues Checkout problems Payment failures App installation issues GraphQL errors Deployment problems
Will my app follow Shopify's latest requirements?
Yes. All development follows Shopify's current app architecture, security practices, OAuth flow, API versioning, and recommended development standards.
Do you provide support after delivery?
Yes. I offer post-delivery support, maintenance, feature enhancements, and long-term Shopify development for growing businesses.
