Community Management Multi-Role App Development

I want to launch a mobile and web app that lets entire neighbourhood communities, their administrators, and external service providers interact smoothly on a single platform. Every user—whether an admin who oversees several buildings, a resident who just moved in, or a plumber answering incident tickets—needs dedicated access with the right permissions.

Core flow
• Quick sign-up and authentication for the three roles (social login acceptable).
• Real-time chat so any member can reach an admin or approved provider without sharing personal phone numbers.
• Incident reporting: residents open a ticket, attach photos, track status; admins can assign it to a provider and monitor resolution.
• Push notifications to keep everyone updated on chat messages, incident status changes, or community announcements.
• A structured database that stores profiles, incidents and chat history safely while remaining easy to query for analytics.
• Basic CMS/console where I can manage communities, users and service categories without touching code.

I care more about a clean, scalable architecture than a specific tech stack, but if you like Flutter + Firebase, React Native + Node, or similar cross-platform solutions, mention why it fits.

When you reply, include a detailed project proposal that outlines:
1. Your suggested stack and reasoning
2. Milestones with timelines for each functional module
3. How you will handle testing, deployment and post-launch support

I’ll review proposals that show a clear understanding of role-based access, real-time messaging and database design. Feel free to attach links to past apps with comparable features so I can see your execution quality.