I'm building a Forex discipline app with Flutter + Firebase
Here's how the auth system works 👇
1/ The Service layer: A clean AuthService class that talks to Firebase. Log in, register, log out, and reset password. No UI logic no state Just pure Firebase calls.
Writing Java code that works locally is easy. Writing code that survives production traffic, scales with business growth, remains maintainable for years, and is understandable by other engineers is the real challenge.