WordPress Donation Gateway Integration

I need a payment gateway integrated on my WordPress site specifically for collecting donations. The integration should support both one-time and recurring donations.

Requirements:
- Integrate a payment gateway (Razorpay).
- Set up for both one-time and recurring donations.
- Ensure secure and smooth transaction processing.

Ideal Skills:
- Experience with WordPress and payment gateway integrations.
- Familiarity with donation systems and forms.
- Strong attention to security and user experience.