Cross-Platform Real Estate Marketplace App -- 2

I'm looking for an experienced Flutter developer to create a cross-platform mobile and web application for buying, selling, or renting properties.

Key Requirements:
- C2C marketplace for real estate and eventually other categories.
- Flexible backend integration with MySQL, Firebase, or Supabase.
- User Interface (UI) and Admin Panel included.
- Clear, scalable, and well-documented open-source code upon completion.

Ideal Skills & Experience:
- Proficient in Flutter development.
- Strong background in backend integration.
- Experience with building comprehensive admin panels.
- Good documentation practices.

Please provide a portfolio with relevant projects.