PayPal Integration Specialist Needed

I need an experienced developer to integrate PayPal as a payment gateway into our existing Node.js platform.

Key features to enable:
- Subscription payments
- Single payments

The codebase is hosted on GitHub and the platform is currently hosted on Aliyun (Alibaba Cloud) in China.

Requirements:
- Proven experience with PayPal integration
- Familiarity with Aliyun (Alibaba Cloud) hosting
- Ability to handle ongoing maintenance and support
- Comfortable working with remote codebases (GitHub)

Please provide:
- Relevant past projects or experience
- Availability
- Estimated timeline for integration