Competition Website Development

I'm seeking a skilled developer to create a dynamic competition website.

Key Features:
- User Authentication: Sign up and log in using email and password.
- Payment Integration: Secure credit/debit card transactions.
- Competition Management: Easily add or remove weekly/monthly competitions.

Ideal Skills and Experience:
- Web development (front-end and back-end)
- Experience with payment gateways
- UI/UX design for user-friendly navigation
- Database management

Looking for a clean, modern design that ensures a smooth user experience. Please provide examples of similar work done.