No, the Flutter SDK is written in Dart . The Flutter engine is written in C++, but if you wanted to write directly on that, you probably would be better off writing directly on top of Skia.
Read moreHow do you call a native function in Flutter?
Flutter Call Native Android Code – Easily Example
Read moreHow does the platform channel work?
Overall the Platform Channel represents a way to connect native code with the Flutter app (Dart) . It can be used to implement any Flutter missing functionality using a platform-specific code (plugins) and call any APIs whether available in Java or Kotlin code on Android, or in Objective-C or Swift code on iOS.
Read moreHow do I use Android native code on Flutter?
Calling Android Native Code in Flutter
Read moreHow do you call a platform-specific code in Flutter?
Writing custom platform-specific code
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