What are your skills and experience working with Dart version 2.0?

I have experience developing mobile applications with Flutter since its stable release, which involves active use of Dart 2.0. My experience includes:

• Using strict typing and null safety system: Actively applying ?, !, and late to ensure type safety and prevent runtime errors.
• Asynchronous programming with async/await and Streams: Developing applications with intensive use of asynchronous operations such as network requests and database interactions.
• Development using various OOP paradigms: Well-versed with classes, inheritance, interfaces, and mixins.
• Writing unit and widget tests: Using test and flutter_test frameworks to ensure code quality.
• Working with libraries and packages from pub.dev: Integrating and utilizing many third-party packages to extend application functionality.
• Optimizing Dart code performance: Understanding garbage collection principles, native code generation, and profiling methods.

Example of primitive asynchronous Dart 2.0 code:

Future<String> fetchData() async {
  // Simulate network request
  await Future.delayed(Duration(seconds: 2));
  return "Data received!";
}

void main() async {
  print("Loading data...");
  String? result = await fetchData(); // Using null safety
  print(result);
}

Using a mixin to add functionality:

mixin Logger {
  void log(String message) {
    print("[LOG] $message");
  }
}

class DataProcessor with Logger {
  void process(String data) {
    log("Processing data: $data");
    // Processing logic...
  }
}

void main() {
  DataProcessor processor = DataProcessor();
  processor.process("Sample data");
}