Payment Gateway Integration with Discounts

I need a freelancer to install the PayPal payment gateway on my website. Additionally, I want to implement advanced payment offers, specifically discount codes.

Key requirements include:
- Install PayPal payment gateway
- Set up discount codes functionality

Ideal skills and experience:
- Experience with PayPal integration
- Familiarity with discount codes setup
- Web development skills for seamless integration

Looking forward to your proposals!