We are looking for an experienced mobile app developer or development team to build a custom digital wallet application for our business. This is not a generic e-commerce app. The core of the project is a closed-loop wallet system where customers can preload money, pay in-store using QR code, and earn rewards as they spend. Project Overview The application will allow users to: Create an account and manage their profile Load money into their in-app wallet (via iyzico or similar payment gateway) View wallet balance and transaction history Pay in-store using a QR code Earn rewards / cashback based on spending View our menu and business information In a later phase, we plan to add in-app ordering functionality, so the architecture should be scalable. Core Features (MVP) User Side Registration & login Secure wallet balance system Payment top-up via Stripe (or similar PCI-compliant provider) QR-based in-store payment Loyalty / rewards logic (e.g. spend-to-earn model) Transaction history Menu display Business information section Admin Panel (Web Preferred) View users and wallet balances Monitor transactions Adjust reward rates / campaigns Manage menu items Basic reporting dashboard Technical Preferences We are open to recommendations, but preferred stack: Flutter or React Native (cross-platform) Firebase / AWS or scalable backend solution Stripe integration Secure QR code implementation Security and data integrity are extremely important. No sensitive payment data should be stored locally. Deliverables Fully functional iOS and Android builds ready for store submission Complete source code Admin panel connected to the same backend Documentation for setup and deployment Post-launch support for initial release fixes Requirements Please only apply if you have experience with: Wallet systems, fintech, or payment integrations Real-time database architecture Secure transaction handling App Store and Google Play submission process When applying, include: Examples of similar apps you’ve built Your proposed tech stack Estimated timeline Budget range We are looking for a long-term partner, not just a quick build. If you'd like, I can also prepare: A shorter version (to attract more bids) A higher-budget / enterprise-level version A version written to attract lower-cost but capable teams Or a version optimized specifically for US / EU developers Let me know your target developer profile.