Cross-Platform Flutter Firebase MVP Development

I'm in need of an experienced developer who can quickly deliver an MVP built using Flutter and Firebase. This has to be a cross-platform solution for Android, iOS, and Web. While exact features aren't finalized, there are a few requirements:

- Building a robust and secure user registration and login system
- Implementing real-time chat functionality
- Adding push notifications for user engagement

While the scope can evolve, these comprise the core functionality required currently. Given the urgency, I need it developed ASAP. Ideal candidates would have:

- Proven experience with Flutter and Firebase
- Prior experience building cross-platform applications
- Demonstrable experience with real-time systems
- Flexibility with time and ability to deliver quickly