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APIs and Payment Integration Expert

$15/hr Starting at $200

Streamline your business operations and enhance customer experience with secure, scalable, and seamless API and payment gateway integrations.

I help startups, SaaS businesses, eCommerce platforms, and enterprise applications connect with third-party services, automate workflows, and enable secure online transactions through reliable API development and integration solutions.

Whether you're building a new platform or extending an existing application, I can help integrate payment systems, external APIs, and business tools to create a connected and efficient ecosystem.

Services Offered:

✔ REST API Development and Integration
✔ Third-Party API Integration
✔ Payment Gateway Integration
✔ Subscription and Recurring Billing Systems
✔ Webhook Development and Event Handling
✔ Authentication and Authorization (OAuth, JWT, API Keys)
✔ CRM, ERP, and Marketing Tool Integrations
✔ Shipping and Logistics API Integration
✔ SMS, Email, and Notification Services Integration
✔ API Documentation and Testing
✔ Custom Middleware Development
✔ Legacy System Integration


Payment Gateways Supported:

✔ Stripe
✔ PayPal
✔ Razorpay
✔ Square
✔ Authorize.Net
✔ Braintree
✔ Apple Pay & Google Pay
✔ Wise and International Payment Solutions

API Integrations Experience:

✔ Google APIs
✔ OpenAI API and AI Integrations
✔ Twilio API
✔ SendGrid and Mailchimp
✔ HubSpot and Salesforce
✔ Zoom and Microsoft Teams
✔ Shopify and WooCommerce APIs
✔ Social Media APIs (Facebook, Instagram, LinkedIn, X)

Why Work With Me?

  • Secure and PCI-conscious implementation practices
  • Scalable architecture designed for growth
  • Clean, maintainable, and well-documented code
  • Reliable webhook handling and error recovery mechanisms
  • Fast communication and timely delivery
  • Experience integrating complex third-party systems into web and mobile applications


From simple payment checkout implementations to complex multi-provider API ecosystems, I deliver solutions that improve automation, reduce manual work, and create seamless user experiences.

Let's discuss your integration requirements and build reliable systems that scale with your business.

About

$15/hr Ongoing

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Streamline your business operations and enhance customer experience with secure, scalable, and seamless API and payment gateway integrations.

I help startups, SaaS businesses, eCommerce platforms, and enterprise applications connect with third-party services, automate workflows, and enable secure online transactions through reliable API development and integration solutions.

Whether you're building a new platform or extending an existing application, I can help integrate payment systems, external APIs, and business tools to create a connected and efficient ecosystem.

Services Offered:

✔ REST API Development and Integration
✔ Third-Party API Integration
✔ Payment Gateway Integration
✔ Subscription and Recurring Billing Systems
✔ Webhook Development and Event Handling
✔ Authentication and Authorization (OAuth, JWT, API Keys)
✔ CRM, ERP, and Marketing Tool Integrations
✔ Shipping and Logistics API Integration
✔ SMS, Email, and Notification Services Integration
✔ API Documentation and Testing
✔ Custom Middleware Development
✔ Legacy System Integration


Payment Gateways Supported:

✔ Stripe
✔ PayPal
✔ Razorpay
✔ Square
✔ Authorize.Net
✔ Braintree
✔ Apple Pay & Google Pay
✔ Wise and International Payment Solutions

API Integrations Experience:

✔ Google APIs
✔ OpenAI API and AI Integrations
✔ Twilio API
✔ SendGrid and Mailchimp
✔ HubSpot and Salesforce
✔ Zoom and Microsoft Teams
✔ Shopify and WooCommerce APIs
✔ Social Media APIs (Facebook, Instagram, LinkedIn, X)

Why Work With Me?

  • Secure and PCI-conscious implementation practices
  • Scalable architecture designed for growth
  • Clean, maintainable, and well-documented code
  • Reliable webhook handling and error recovery mechanisms
  • Fast communication and timely delivery
  • Experience integrating complex third-party systems into web and mobile applications


From simple payment checkout implementations to complex multi-provider API ecosystems, I deliver solutions that improve automation, reduce manual work, and create seamless user experiences.

Let's discuss your integration requirements and build reliable systems that scale with your business.

Skills & Expertise

APIAPI DevelopmentArtificial IntelligenceChatbotsData ExtractionEmbedded DevelopmentGISJavaScriptJSONPoint of Sale Solutions

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