Event Invitation & RSVP App (Similar to Evite) – Mobile Flutter & Firebase

I am looking for a skilled Flutter developer (or a team) to build a cross-platform event invitation and RSVP app, supporting iOS, Android, and web. The app should allow users to create, send, and manage invitations via email and SMS, track RSVPs in real-time, and engage with guests through an event feed.

Key Features:
For Hosts:
✅ Select from pre-designed free and premium invitation templates
✅ Customize event details (title, time, location, message)
✅ Upload custom images and personalize invitations
✅ Send invitations via SMS & email (integration with Twilio, SendGrid, or Firebase Cloud Messaging)
✅ Track RSVPs in real time (view who has seen the invite and responded)
✅ Send reminders and updates to guests
✅ Add video call links for virtual events
✅ Event management dashboard (edit, update, or cancel events)

For Guests:
✅ RSVP directly from the email or SMS invite
✅ View event details and receive real-time notifications
✅ Engage through a private event feed (likes, comments, photo sharing)
✅ Option to add +1s and specify attendance details

Technology Stack:
Frontend: Flutter (for iOS, Android, and Web)
Backend: Firebase (Firestore, Firebase Auth, Firebase Cloud Functions)
Notifications: Firebase Cloud Messaging (Push Notifications)
Email & SMS Integration: Twilio, SendGrid, or Firebase
Storage: Firebase Storage (for images & media)
Hosting & Deployment: Firebase Hosting (for web version)
Deliverables:
✔ Fully functional Flutter mobile and web app
✔ Intuitive and responsive UI/UX design
✔ Secure Firebase backend setup
✔ API integration for email & SMS delivery
✔ Deployment & documentation


If you have experience with Flutter & Firebase, please provide:
✅ Portfolio showcasing similar projects
✅ Estimated timeline and milestones
✅ Tech stack and approach