Social Networking Mobile App -- 2

I’m looking to create a mobile app called “Hidup Sukses” that revolves around social networking. The core of the product is a clean, intuitive space where users can log in, build a profile, and freely share their own content—photos, short videos, articles, or status updates—directly with the community.

Key objectives
• Build for iOS and Android with a modern cross-platform framework (Flutter or React Native preferred).
• Implement secure user authentication so each member has a personal profile.
• Design and code a smooth content-sharing flow: users should be able to post, edit, and delete their own creations, add captions, and attach basic media.
• Provide an activity feed that orders posts chronologically or by relevance, refreshing in near real-time.
• Enable simple engagement actions—likes, comments, or saves—to encourage interaction.
• Create an approachable, uplifting UI in line with the “Hidup Sukses” theme.

I already have the high-level concept and feature list, but I need assistance with architecture, UI/UX, coding, and basic QA until the first public release is ready for the app stores. Clean, well-documented code and a short hand-off guide will complete the job.