Flutter Expert for User-Centric App

I'm in search of a seasoned Flutter expert who can breathe life into my vision for an app with the perfect combination of user-friendly features. Proficiency in user authentication, push notifications, and in-app messaging is critical. The app should be compatible with both iOS and Android platforms. Ongoing app updates will also be required to ensure its smooth functioning and to keep up with dynamic user needs. Please bid if you are a committed, competent and versatile Flutter maestro open to long-term collaboration.