Multi-Feature Social Media & Listing App

I'm looking for a seasoned app developer or a team who can create a social media app akin to Instagram, but with integrated product listing features. This app should be developed for both Android and iOS platforms and should encompass the following main components: Social Media Features: - Photo/Video sharing: Users should be able to upload, share and comment on visual content. - Direct messaging: A private message system for users to communicate. - Story feature: A temporary content sharing feature that disappears after 24 hours. - Product Listing feature: A dedicated section for users to list and sell their products. Product Listing Features: - Search and filter options: Users should be able to easily navigate and find products of their interest. - User reviews and ratings: A system for users to provide feedback on products and sellers. - Payment gateway integration: Secure and seamless transactions should be facilitated through the app. User Authentication: - Email and Password: Standard registration and login process. - Two-factor authentication: For enhanced security, especially during login process. The ideal candidate or team for this project should have a solid background in app development with a portfolio of similar projects. Experience with implementing secure payment gateways and user review systems is a definite plus. Knowledge of creating engaging social media features will also be highly beneficial. Please include examples of your previous work in your proposal.