Cross-Platform Mobile App Build

I’m ready to turn a new app idea into reality and I need a developer who can deliver it for BOTH iOS and Android from a single codebase or two native builds—whichever you believe best matches the scope once we refine the feature set together. Right now the concept itself is still flexible, so your guidance on architecture, UI/UX choices, and the right tech stack (Flutter, React Native, Swift + Kotlin, etc.) will be invaluable. I will share full product goals, user flow sketches, and wireframes as soon as we sign off on the initial approach, but I want to be sure we have: • End-to-end development, including secure backend/API integration • Milestone-based builds I can test on TestFlight and internal Android tracks • Clean, well-commented source code committed to my private Git repo • App Store & Google Play submission support, with store-ready screenshots and descriptions • A brief hand-off document so I can maintain or extend the project confidently If you’re comfortable starting from the ground up, advising on the optimal feature roadmap, then building, testing, and shipping a polished cross-platform app, let’s discuss timelines and the first milestone.