Full-Featured Mobile and Web Auction App

As we plan to develop a comprehensive mobile app and web application for managing paid classifications and auctions, we're on the lookout for experienced developers to bring our vision to life. Key Features for the Mobile App: - User registration/login - Listing management - Creation of classified ads with detailed descriptions, images, and pricing - The solution should support multi countries advertisers. - Ability to set up auctions with bidding functionality according to a specific time setted by the enduser. - Subscription managent for selling advertising areas in both mobile app and the website. - The ability to get free listing for enduser if he share our app to a friend and a new user success to activate a new accout. - The ability to manage price type of advertiser according to our pricing strategy. For example, in the begining of publishing the app it will be free service for the first 6 months. Then it will cost the advertiser certain amount and so on.- Auction bidding - Profile Management for Sellers and Buyers - Search and Filter Options - Advanced search filters for easy navigation and discovery of listings - Searching inside the filtered results. - Messaging System - In-app messaging functionality for communication between sellers - Payment Gateway Integration - Secure payment processing for transactions - Notification System - Push notifications for new listings, messages, bids, etc. - Admin Panel - Backend dashboard for managing users, listings, payments, and overall platform operations. - Analytics and Reporting - Insights into user activity, popular listings, revenue generation, etc. - Rating and Review System: - Allow users to rate and review sellers based on their experiences Key Features for the Web Application: - User registration/login - Listing management - Auction management (The same features mentioned in the mobile app) - Responsive design for seamless experience across devices - Integration with third-party APIs (if necessary like weather forcast data) - Scalability for future enhancements and updates - Compliance with security standards and data protection regulations The ideal candidate for this project should have experience in developing auction-based applications, along with a strong background in mobile and web application development. The ability to seamlessly integrate payment gateways and manage user profiles is crucial. We expect the end product to be user-friendly, secure, and scalable. The project will also require a well-designed admin panel to manage listings, auctions, users, and transactions. Please share relevant experience, and provide a clear timeline and cost estimation in your proposal.