I need to integrate the API of my project to a button

Project Title: Payment Gateway API Integration for Website

I'm looking for a developer to integrate the payment gateway API into a button on my website. The ideal candidate should have experience with JavaScript, specifically Node.js, React, and Angular.

Requirements:
- Integrate the Payment Gateway API to a button on my website
- Ensure smooth and secure payment processing
- Test and debug any issues related to the integration.
- Provide documentation on the integration process.

Skills and experience:
- Strong command of JavaScript, specifically Node.js, React and Angular.
- Experience with API integration, particularly payment gateway API. (If you know how to handle the payment market API better)
- Knowledge of website development and familiarity with web technologies.
- Attention to detail and ability to troubleshoot and resolve integration issues.
- Excellent communication skills and ability to work collaboratively.

If you have the necessary skills and experience, please submit your proposal along with examples of previous API integration projects.