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Fiverr Pro
English
$
USD
I will fix or build stripe API, shopify API, and rest API integration
William A
About this gig
Need a reliable API integration developer?
I build and fix Stripe API, Shopify API, REST API, and webhook integrations for secure, scalable web applications. Whether you need payment integration, API debugging, workflow automation, or backend development, I deliver clean, production ready solutions.
Services:
- Stripe API (Checkout, Payments, Subscriptions, Connect)
- Shopify API (Admin & Storefront API)
- REST API & Third Party API Integration
- Webhook Development & Automation
- API Bug Fixes & Debugging
- OAuth2 & JWT Authentication
- Payment Gateway Integration
- Backend Development (Node.js, PHP, Python)
- Data Sync & Workflow Automation
Technologies: Stripe, Shopify, REST APIs, Webhooks, Node.js, PHP, Python, JavaScript, Firebase, Supabase, Zapier, Make.com, n8n.
You'll Receive:
- Secure API integration
- Clean, scalable code
- Fully tested, production-ready solution
- Source code & documentation
- Fast communication and reliable support
Message me before ordering so we can discuss your project and build the right API solution.
Get to know William A
William A
Stripe, Shopify and REST API Integration Expert
- FromUnited Kingdom
- Member sinceJan 2026
- Avg. response time7 hours
Languages
English, German, Spanish, French, Italian
I help businesses fix website errors, build API integrations, and improve web app performance for speed and reliability.
I specialize in Stripe API, Shopify API, REST APIs, and webhook automation, creating secure backend systems for modern apps.
Using PHP, JavaScript, Python, Firebase, and Supabase, I develop, troubleshoot, and automate workflows with clean data sync.
If you need a reliable backend or API integration expert to build, fix, or improve your system, I’m ready to help.
My Portfolio
FAQ
Can you fix an API that is already built but not working?
Yes. I can troubleshoot and fix broken Stripe API, Shopify API, REST API, and webhook integrations, including authentication errors, failed requests, payment issues, and API connection problems.
What APIs do you work with?
I specialize in Stripe API, Shopify API, REST APIs, webhooks, OAuth2, JWT authentication, and third-party API integrations. I also work with custom APIs for SaaS, CRM, and eCommerce applications.
What do you need to get started?
Please provide your project requirements, API documentation, access credentials (if needed), and a brief description of the issue or the integration you want to build.
Can you integrate multiple APIs into one system?
Yes. I can connect Stripe, Shopify, REST APIs, CRMs, databases, and third-party services to automate workflows, synchronize data, and build scalable backend solutions.
Should I contact you before placing an order?
Yes. Please message me before ordering so we can discuss your project requirements, confirm compatibility, and recommend the best package for your API integration or backend development needs.
