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I will develop custom PHP website, fix and integrate API payment gateway and automation
Muller
About this gig
Need to connect your website, mobile app, CRM, payment gateway, or third party service without dealing with broken APIs, failed syncs, or manual work? You're in the right place. I will develop PHP websites, fix API issues, and build secure API integrations, webhooks, payment gateways, and automation workflows that save time, improve efficiency, and keep your systems synchronized in real time.
WHAT YOU'LL GET
- REST API Integration & Development
- API Fixing & Troubleshooting
- Third Party API Integration
- Payment Gateway Integration
- Webhook Setup & Automation
- Real-Time Data Synchronization
- CRM Integration
- OpenAI & ChatGPT API Integration
- Shopify API Integration
- WooCommerce API Integration
- WordPress API Integration
- Custom API Development
- JSON & XML API Handling
- Backend Development
- PHP Website Development
- Mobile App API Integration
- AI Automation Workflows
- Secure Authentication (OAuth, JWT, API Keys)
PLATFORMS
- WordPress
- WooCommerce
- Shopify
- Laravel
- PHP
- React
- Next.js
- Node.js
- Custom Websites App & Mobile App
"Great businesses grow faster when their systems work together."
Let's build integrations that automate tasks, eliminate manual work, and help your business scale with confidence.
Get to know Muller
Muller
Engineering AI ' Automation ' Web Solutions That Scale Business
- FromGermany
- Member sinceApr 2026
- Avg. response time1 hour
Languages
German, English, French, Spanish, Italian, Arabic
Hi, I'm Muller, a Full-Stack Developer specializing in WordPress, WooCommerce, PHP Development, AI Applications, API Integrations, and n8n Automation.
I help businesses, startups, and entrepreneurs build scalable digital solutions, automate workflows, and improve efficiency through custom development and intelligent automation.
My focus is delivering clean, secure, and reliable solutions with clear communication, attention to detail, and on-time delivery. Every project is built to support growth, performance, and long-term success.
Let's build something exceptional together.
Other Software Development Services I Offer
FAQ
Can you fix a broken API integration or webhook?
Yes. I can troubleshoot and fix API errors, authentication issues, failed webhooks, broken data synchronization, timeout errors, payment gateway issues, and third-party API connection problems.
Which APIs can you integrate?
I can integrate REST APIs, SOAP APIs, payment gateways, CRMs, AI tools, social media APIs, shipping APIs, ERP systems, and custom third-party APIs. Examples include Stripe, PayPal, OpenAI, ChatGPT, Shopify, WooCommerce, HubSpot, Salesforce, Twilio, WhatsApp, Google Maps, and many more.
Can you develop a custom API from scratch?
Yes. I can build secure custom APIs, backend systems, and database integrations using PHP and modern web technologies tailored to your business requirements.
Do you provide automation and real-time data synchronization?
I can create automation workflows, webhook integrations, and real-time synchronization between websites, CRMs, payment gateways, mobile apps, and third-party platforms.
Can you integrate APIs into my existing website?
Yes. Whether your website is built with PHP, WordPress, WooCommerce, Laravel, Shopify, React, Next.js, or another platform, I can integrate APIs without affecting existing functionality.
What do you need from me before starting?
I need: • API Documentation • Website or Application Details • Access Credentials (if required) • A clear description of the desired functionality If you're unsure, simply send me the project details and I'll guide you.
Do you integrate payment gateways?
Yes. I can integrate and troubleshoot Stripe, PayPal, Paystack, Flutterwave, Razorpay, Authorize.Net, and other payment gateways, including subscriptions, recurring billing, and webhook events.
Can you build the website as well as the API integration?
Yes. Unlike many API specialists, I can develop the entire PHP website, backend system, database structure, automation workflow, and API integrations as a complete solution.
Will my project be secure?
Security is a priority. I implement authentication, authorization, input validation, secure API communication, and industry best practices to protect your application and data.
Should I contact you before placing an order?
Yes. Every API and automation project is different. Sending a message first allows me to review your requirements and recommend the best package, timeline, and solution for your needs.
