Apps Developer Roadmap

// Pseudocode: analytics funnel
analytics.log('checkout_started', { cartId });
analytics.log('purchase_completed', { cartId });

// Feature module sketch
class CheckoutScreen extends StatelessWidget {
  const CheckoutScreen({super.key});
  @override
  Widget build(BuildContext context) => const Placeholder();
}

// Feature module sketch
class CheckoutScreen extends StatelessWidget {
  const CheckoutScreen({super.key});
  @override
  Widget build(BuildContext context) => const Placeholder();
}

// Feature module sketch
class CheckoutScreen extends StatelessWidget {
  const CheckoutScreen({super.key});
  @override
  Widget build(BuildContext context) => const Placeholder();
}

// Feature module sketch
class CheckoutScreen extends StatelessWidget {
  const CheckoutScreen({super.key});
  @override
  Widget build(BuildContext context) => const Placeholder();
}

// Feature module sketch
class CheckoutScreen extends StatelessWidget {
  const CheckoutScreen({super.key});
  @override
  Widget build(BuildContext context) => const Placeholder();
}

// Concept: isolate expensive subtree builds
// Flutter: const constructors, RepaintBoundary
// RN: memo + stable props for list rows

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

@State private var count = 0
// SwiftUI — owns view-local state
// Flutter: StatefulWidget + dispose() for streams

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Debounced search — avoids thrashing the UI thread
void onQueryChanged(String q) {
  _debouncer.run(() => repository.search(q));
}

// Example intent filter / associated domains — verify on device
https://app.example.com/product/42

// Declarative routes (concept)
// GoRouter, Navigator 2.0, or RNN — pick one per app

// Declarative routes (concept)
// GoRouter, Navigator 2.0, or RNN — pick one per app

// Declarative routes (concept)
// GoRouter, Navigator 2.0, or RNN — pick one per app

// Concept: single store + actions
// dispatch(loadProfile()); // then render from store

// Single source of truth
class AppState {
  final User? user;
  final bool loading;
}

// Single source of truth
class AppState {
  final User? user;
  final bool loading;
}

// Single source of truth
class AppState {
  final User? user;
  final bool loading;
}

// Single source of truth
class AppState {
  final User? user;
  final bool loading;
}

// Flutter ThemeData sketch
ThemeData(
  colorScheme: ColorScheme.fromSeed(seedColor: Colors.teal),
  textTheme: const TextTheme(titleLarge: TextStyle(fontSize: 22)),
)

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

dependencies:
  flutter:
    sdk: flutter
  # Pick one design system and theme it globally

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

const spacing = { xs: 4, sm: 8, md: 16, lg: 24 };
const radius = { card: 12 };

Semantics(
  label: 'Submit order',
  button: true,
  child: FilledButton(onPressed: onSubmit, child: const Text('Submit')),
);

// Meaningful labels for VoiceOver / TalkBack
accessibilityLabel: 'Close dialog',

// Meaningful labels for VoiceOver / TalkBack
accessibilityLabel: 'Close dialog',

// Meaningful labels for VoiceOver / TalkBack
accessibilityLabel: 'Close dialog',

// Meaningful labels for VoiceOver / TalkBack
accessibilityLabel: 'Close dialog',

GET /v1/me HTTP/1.1
Host: api.example.com
Authorization: Bearer <access_token>
X-Request-Id: 7b2c9a1f-...

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

final res = await client.get(Uri.parse('https://api.example.com/v1/me'),
  headers: {'Authorization': 'Bearer $token'});

testWidgets('shows title', (tester) async {
  await tester.pumpWidget(const MaterialApp(home: HomeScreen()));
  expect(find.text('Home'), findsOneWidget);
});

// Fast unit test around pure logic
test('formats currency', () {
  expect(formatCurrency(10), '\$10.00');
});

// Fast unit test around pure logic
test('formats currency', () {
  expect(formatCurrency(10), '\$10.00');
});

// Fast unit test around pure logic
test('formats currency', () {
  expect(formatCurrency(10), '\$10.00');
});

// Fast unit test around pure logic
test('formats currency', () {
  expect(formatCurrency(10), '\$10.00');
});

flutter --version
node -v
# Lock toolchain in CI with asdf, FVM, or Volta

name: mobile-ci
on: [push]
jobs:
  build:
    runs-on: macos-latest
    steps:
      - run: flutter test

name: mobile-ci
on: [push]
jobs:
  build:
    runs-on: macos-latest
    steps:
      - run: flutter test

name: mobile-ci
on: [push]
jobs:
  build:
    runs-on: macos-latest
    steps:
      - run: flutter test

name: mobile-ci
on: [push]
jobs:
  build:
    runs-on: macos-latest
    steps:
      - run: flutter test

name: mobile-ci
on: [push]
jobs:
  build:
    runs-on: macos-latest
    steps:
      - run: flutter test

TextField(
  keyboardType: TextInputType.emailAddress,
  autofillHints: const [AutofillHints.email],
  decoration: const InputDecoration(labelText: 'Email'),
);

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

// Pseudocode: shared schema
const Email = z.string().email();
parse(body, { email: Email });

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(email)) {
  return 'Enter a valid email';
}

AnimatedOpacity(
  opacity: visible ? 1 : 0,
  duration: const Duration(milliseconds: 200),
  child: child,
);

AnimationController(vsync: this, duration: const Duration(milliseconds: 220));

AnimationController(vsync: this, duration: const Duration(milliseconds: 220));

AnimationController(vsync: this, duration: const Duration(milliseconds: 220));

AnimationController(vsync: this, duration: const Duration(milliseconds: 220));

AnimationController(vsync: this, duration: const Duration(milliseconds: 220));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

import 'package:flutter/material.dart';

void main() => runApp(const MaterialApp(
  home: Scaffold(body: Center(child: Text('Hello'))),
));

# Example lanes (concept)
fastlane ios beta
fastlane android internal

lane :beta do
  build_app(scheme: 'MyApp')
  upload_to_testflight
end

lane :beta do
  build_app(scheme: 'MyApp')
  upload_to_testflight
end

lane :beta do
  build_app(scheme: 'MyApp')
  upload_to_testflight
end