Cross-Platform Business App Build

I am ready to move an existing concept into a fully-featured business application that runs natively on both Android and iOS. The core build needs secure user authentication and real-time push notifications from day one so staff and customers always see the latest account activity as it happens.

Clean, maintainable code is a must; I plan to keep evolving the product, and future milestones may add payment integration and other modules, so the architecture should be prepared for that growth. If you prefer Kotlin + Swift, Flutter, or React Native, let me know why your choice fits long-term maintainability and App Store / Google Play compliance.

To get started I will share wireframes, API endpoints, and a brief functional spec. You will return:
• Complete Android and iOS builds ready for store submission
• Source code in a private repo with clear setup instructions
• A short hand-off session or video walkthrough so my team can run the project locally

Experience publishing production apps, implementing Firebase (or similar) push, and setting up secure login flows will weigh heavily in my decision. If this sounds like a good fit, tell me about a recent project that matches these requirements and your preferred tech stack.