Multi-Vendor E-commerce Android App Development

I am seeking an experienced Android app developer to create a multi-vendor e-commerce app. This platform should allow various sellers to list and sell their physical goods.

Key Features:
- A robust system for seller profiles and dashboards: Each seller should have their own profile and dashboard where they can manage their inventory, track sales, and analyze their performance.
- A secure and reliable payment gateway: Given the nature of e-commerce, the app must integrate a secure payment gateway to facilitate safe transactions.
- A user reviews and ratings system: To foster trust and maintain quality, the app should allow users to leave reviews and ratings for products and sellers.

Ideal candidates for this project should have:
- A strong portfolio of e-commerce app development, specifically multi-vendor platforms.
- Excellent understanding of secure payment systems integration.
- Demonstrable experience in incorporating user interaction features, such as reviews and ratings, into apps.

Please include examples of similar projects you've completed in your proposal.