Comprehensive Django/Flask Multivendor App

I'm looking for a seasoned Django/Flask developer to create a comprehensive multivendor app. The primary features for this platform should include user registration and login, vendor management, and product listing and search functionality. It's crucial that users can easily register and login to browse or list products and vendors effectively manage their profiles. Furthermore, the platform should include a feature for online transactions; hence, a solid understanding of payment gateway integration is required. Your experience in creating similar platforms would be valuable in this project.