Flutter Method Channel Bug – 1-Day Fix for Senior Dev

PLEASE NOTE:
1. you must have xcode 14 due to the code is so old, check this first before you bid or respond.
2. you must have iphone X/10 or newer but not iphone 16 and you cannot run simulator with this software (too much toexplain here)

UPSIDE: if you can do this fast we need to upgrade the code for the app aftervthe bugs are done

I have a fully working Flutter app that calls a backend API delivering a dataset across 14 areas. All data is successfully received by Flutter. However, 4 of the 14 areas are not forwarded from Flutter to the native layer.

I suspect this is a format of the data in th methodchannel. That was the issue at another point.

Backend: working
Native modules (iOS + Android): confirmed solid (stable for 2+ years)
Flutter → MethodChannel: failing to pass 4 specific areas (10 areas work fine)

The Issue
- Flutter receives all 14 areas from the API
- Only 10 areas are passed to the native layer via MethodChannel
- The 4 missing areas are not reaching native, even though structure/format is the same
- This is likely a minor Dart-side formatting or dispatch issue

Your Task
- Investigate the Dart → MethodChannel logic
- Confirm the 4 failing areas are properly forwarded
- Validate they reach iOS (Swift) and Android (Java/Kotlin)
- Fix any Dart-side bugs or mismatches
- Keep everything else untouched — the app works well overall

Requirements
- Senior-level Flutter experience
- Deep knowledge of MethodChannel (both iOS and Android sides)
- Experience with native integration debugging
- Mac with iOS build support (state your Mac model)
- Can clone, run, test app end-to-end

To Apply
Please reply with:
1. Mac model (e.g., MacBook Pro M2, Sonoma)
2. Years of experience in Flutter + Native (iOS & Android)
3. Your MethodChannel experience (examples welcome)
4. Availability (ready to start = great)

This is a micro-engagement (1-day task) — ideal for a senior dev who knows native-flutter bridges cold.

Versions
Flutter and Dart

Flutter Version: 3.3.8
Dart Version: 2.18.4

Android

Minimum SDK Version: 21
Target SDK Version: 33
Build Tools Version: 33.0.0
Gradle Plugin Version: 7.4
Java Compatibility: Java 11 (sourceCompatibility and targetCompatibility)

iOS

Minimum iOS Version: 11.0
Xcode Version: 14.0
Swift Version: 5.0
CocoaPods Version: 1.11.0

Dependencies
Major Dependencies and Versions

GetX (State Management): 4.3.8
Camera: 0.8.1+5
Dio: 4.0.0
Firebase Core: 1.4.0
Firebase Auth: 3.0.1
Flutter ScreenUtil: 5.1.1
Intl: 0.17.0
Shared Preferences: 2.0.6
Sqflite: 2.0.0+3
Url Launcher: 6.0.9