E-commerce Site Enhancement

I'm looking to enhance my e-commerce website by adding some key functionalities.

Essential requirements include:
- Integrating a secure payment gateway
- Implementing a comprehensive product review system
- Adding a user-friendly wishlist feature

Ideal Skills and Experience:
- Proven experience in developing and enhancing e-commerce websites
- Expertise in payment gateway integration
- Familiarity with product review systems and wishlist functionalities
- Strong knowledge of UI/UX design principles to ensure a seamless user experience

Please provide relevant work samples and a detailed proposal.