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$
USD
I will do paypal integration and stripe payment gateway setup
Mathias James
About this gig
Need PayPal or Stripe integration for your website? I'll help you accept payments with a reliable checkout experience.
I'm a Full Stack Software Engineer with 4+ years of experience in web development, payment APIs and checkout integrations. I've worked on Stripe and Flutterwave payments, WooCommerce checkout customization and Shopify integrations.
My services include:
- PayPal and Stripe payment gateway integration
- Stripe Checkout and PayPal payment buttons
- Payment API and webhook integration
- WooCommerce payment setup and checkout fixes
- React, Next.js and Node.js payment integration
- Payment verification and error troubleshooting
- One-time payments and custom checkout flows
- Sandbox testing and payment confirmation
Why work with me?
- Real-world fintech and e-commerce development experience
- Frontend and backend integration expertise
- Attention to secure API handling and reliable payment flows
- Clear communication and tested delivery
Whether you need a simple payment button, a checkout fix or a custom payment API, I can help you find a suitable solution.
Please message me before ordering with your website platform and payment requirements so we can confirm the scope and get right package.
Get to know Mathias James
Mathias James
Full Stack Developer, Payment API and Ecommerce Expert
- FromUnited States
- Member sinceOct 2026
Languages
English
Full Stack Software Engineer with 4+ years of experience building scalable web applications, payment integrations, and backend APIs. I specialize in React, Next.js, Node.js, NestJS, TypeScript, Shopify, and WooCommerce.My expertise includes Paypal, Stripe and Flutterwave payments, custom checkout solutions, API integrations, and payment verification. I've built production systems serving thousands of users.I help businesses develop secure, high-performing websites and seamless payment experiences with clean code, reliable delivery,and clear communication and thorough testing for every project.
My Portfolio
FAQ
Can you integrate PayPal or Stripe into my existing website?
Yes. I can help with supported checkout integrations for custom websites and platforms such as WooCommerce. Send me your website platform and requirements so I can confirm compatibility.
Do I need an active PayPal or Stripe account?
Yes. You will need your own eligible payment provider account. I handle the website and API integration, not payment account approval or business verification.
Can you fix PayPal or Stripe payments that are not working?
Yes. I can investigate failed payment requests, checkout errors, redirect issues and webhook problems. Please share the error details before ordering so I can assess the scope.
Do you provide custom payment API and webhook integration?
Yes. I can develop backend payment flows using technologies such as Node.js, Express.js or NestJS, including server-side verification and webhook handling.
Can you integrate recurring payments and subscriptions?
Subscription integrations may be available as a custom order, depending on the website, payment provider and subscription requirements. Please contact me first.
Will you test the payment integration before delivery?
Yes. I test the agreed checkout flow using an appropriate test or sandbox environment. Live-mode verification depends on account access, provider approval and the project scope.
Can you integrate PayPal or Stripe with Shopify?
I can assess integrations supported by Shopify and your account. Shopify controls which payment providers and checkout customizations are permitted, so I cannot guarantee every requested integration.
Will you need my passwords or payment card details?
No payment card information is required. Where possible, please provide role-based access or test credentials. Never send secret keys, passwords or sensitive payment information in ordinary chat messages.
Can you work with US-based businesses?
Yes. I can work with US-based businesses remotely, provided the requested payment integration is supported by the client's provider account and website platform.
Why should I contact you before placing an order?
Each website has different payment requirements. A short discussion helps confirm the provider, platform, existing code, desired checkout flow and correct package before work begins.
