Expert Commentary News Portal Development

I'm looking for a skilled web developer to create a news portal on Wix focused on expert commentary and opinions. The platform will primarily feature written articles from industry experts.

Key features should include:
- User-friendly navigation
- Search functionality
- Article categorization by topic (Politics, Science and Technology, Health)
- Author profiles with credentials
- Comment sections for reader engagement
- Mobile responsiveness

Ideal candidates should have experience in:
- News or content-heavy website development
- SEO optimization
- Implementing user engagement tools

Please share your portfolio and relevant experience.