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Enterprise-grade security expertise with production-ready patterns for OWASP Top 10 2021, zero-trust architecture, threat modeling (STRIDE, PASTA), secure SDLC, DevSecOps automation, cloud security, cryptography, identity & access management, and compliance frameworks (SOC 2, ISO 27001, GDPR, CCPA).
Verwandte Berufe SOC
Basierend auf der SOC-Berufsklassifikation
name moai-lang-kotlin version 4.0.0 created 2025-10-22T00:00:00.000Z updated 2025-11-13T00:00:00.000Z status stable description Kotlin 2.0 Multiplatform Enterprise Development with KMP, Coroutines, Compose Multiplatform, and Context7 MCP integration. Advanced patterns for mobile, backend, and cross-platform development. keywords ["kotlin","kmp","coroutines","compose","android","multiplatform","enterprise","context7"] allowed-tools ["Read","Bash","mcp__context7__resolve-library-id","mcp__context7__get-library-docs"]
Lang Kotlin Skill - Enterprise v4.0.0
Skill Overview
Kotlin 2.0 Multiplatform enterprise development with advanced async patterns, KMP architecture, and Compose Multiplatform UI. This skill provides patterns for mobile, backend, and cross-platform development with full Context7 MCP integration for real-time documentation access.
Core Capabilities
✅ Kotlin 2.0 Multiplatform (KMP) enterprise architecture
✅ Advanced coroutines and structured concurrency patterns
✅ Compose Multiplatform UI development (Android, iOS, Web)
✅ Enterprise testing strategies with Kotest and MockK
✅ Context7 MCP integration for latest documentation
✅ Performance optimization and memory management
✅ Modern architecture patterns (MVI, Clean Architecture)
✅ Security best practices for production systems
Quick Reference
When to Use This Skill
Automatic activation :
Kotlin/KMP development discussions
Multiplatform project architecture and design
Mobile development with shared business logic
Async programming and coroutine patterns
Compose Multiplatform UI development
Manual invocation :
Design multiplatform architecture
Implement advanced async patterns
Optimize performance and memory usage
Review enterprise Kotlin code
Technology Stack (2025-11-13)
Component Version Purpose Status Kotlin 2.0.20 Core language Current Coroutines 1.8.0 Async programming Current Compose Multiplatform 1.6.10 UI framework Current Serialization 1.7.1 JSON/data serialization Current Ktor 2.3.12 HTTP client/server Current Android Gradle Plugin 8.5.0 Android build Current
Core Language Features
1. Null Safety & Type System Kotlin's null safety is a game-changer for enterprise development:
val name: String? = "John"
val length = name?.length ?: 0
@JvmInline
value class UserId (val value: String)
sealed class Result <T > {
data class Success <T >(val data : T) : Result<T>()
data class Error (val exception: Throwable) : Result<Nothing >()
}
Eliminates NullPointerException at compile time
Zero runtime overhead with inline classes
Type-safe domain models
2. Coroutines - Structured Concurrency Enterprise async patterns with built-in safety:
coroutineScope {
val result1 = async { fetchData("API1" ) }
val result2 = async { fetchData("API2" ) }
awaitAll(result1, result2)
}
withContext(Dispatchers.IO) {
val data = blockingIoCall()
}
supervisorScope {
launch { riskyOperation1() }
launch { riskyOperation2() }
}
Automatic cancellation and resource cleanup
Prevents memory leaks and zombie coroutines
Context-aware execution
3. Extension Functions & DSLs Powerful language extension without inheritance:
fun html (block: HtmlBuilder .() -> Unit ) : String {
val builder = HtmlBuilder()
builder.block()
return builder.build()
}
val page = html {
h1("Welcome" )
p("This is a paragraph" )
}
Multiplatform Architecture
Project Structure kmp-enterprise-app/
├── shared/
│ ├── src/
│ │ ├── commonMain/kotlin/
│ │ │ ├── domain/ # Business logic
│ │ │ ├── data/ # Data layer
│ │ │ └── presentation/ # State management
│ │ ├── androidMain/kotlin/
│ │ ├── iosMain/kotlin/
│ │ └── commonTest/kotlin/
├── androidApp/
├── iosApp/
└── webApp/
expect/actual Pattern
expect class PlatformDatabase {
suspend fun saveData (data : String ) : Result<Unit >
}
actual class PlatformDatabase {
actual suspend fun saveData (data : String ) = try {
room.insert(data )
Result.success(Unit )
} catch (e: Exception) {
Result.failure(e)
}
}
actual class PlatformDatabase {
actual suspend fun saveData (data : String ) = try {
coreData.save(data )
Result.success(Unit )
} catch (e: Exception) {
Result.failure(e)
}
}
Share business logic in commonMain
Isolate platform specifics in platform modules
Compile-time platform selection
Advanced Async Patterns
Flow - Reactive Streams
fun getUsersFlow () : Flow<User> = flow {
while (true ) {
val users = repository.fetchUsers()
emit(users)
delay(5000 )
}
}
getUsersFlow()
.map { it.copy(name = it.name.uppercase()) }
.filter { it.isActive }
.distinctUntilChanged()
.collect { updateUI(it) }
StateFlow - Mutable State class CounterViewModel {
private val _count = MutableStateFlow(0 )
val count: StateFlow<Int > = _count.asStateFlow()
fun increment () { _count.value++ }
fun decrement () { _count.value-- }
}
viewModel.count.collect { count ->
updateUI("Count: $count " )
}
Compose Multiplatform UI
Basic Components @Composable
fun UserListScreen (users: List <User >) {
Column(modifier = Modifier.fillMaxSize()) {
Text("Users" , style = MaterialTheme.typography.headlineLarge)
LazyColumn {
items(users) { user ->
UserCard(user)
}
}
}
}
@Composable
fun UserCard (user: User ) {
Card(modifier = Modifier.fillMaxWidth().padding(8. dp)) {
Column(modifier = Modifier.padding(16. dp)) {
Text(user.name, style = MaterialTheme.typography.titleMedium)
Text(user.email, color = Color.Gray)
}
}
}
Declarative UI
Reusable components
State management integration
Enterprise Patterns
Dependency Injection with Koin val appModule = module {
single { HttpClient() }
single { UserRepository(get ()) }
viewModel { UserListViewModel(get ()) }
}
val userService: UserService = get ()
Error Handling
suspend fun fetchData () : Result<String> = try {
Result.success(apiCall())
} catch (e: Exception) {
Result.failure(e)
}
fetchData()
.onSuccess { data -> updateUI(data ) }
.onFailure { error -> showError(error) }
Testing @Test
fun testAsync () = runTest {
val result = someAsyncFunction()
assertEquals("expected" , result)
}
@Test
fun testWithMock () {
val repo = mockk<Repository>()
coEvery { repo.fetch("1" ) } returns "data"
coVerify { repo.fetch("1" ) }
}
Context7 MCP Integration This skill integrates with Context7 for real-time access to official documentation:
Available Resources
Kotlin Language : /kotlin/kotlin
Coroutines : /kotlin/kotlinx.coroutines
KMP : /kotlin/kotlin.multiplatform
Compose : /jetbrains/compose-multiplatform
Ktor : /ktor/ktor
Serialization : /kotlin/kotlinx.serialization
Usage Example
val docs = mcp__context7__get-library-docs(
context7CompatibleLibraryID = "/kotlin/kotlinx.coroutines"
)
Performance Optimization
Memory Efficiency
Use Sequence for lazy evaluation :
(1. .1_000_000 ).asSequence()
.filter { it % 2 == 0 }
.map { it * 2 }
.toList()
Inline classes for zero-overhead :
@JvmInline
value class UserId (val value: String)
Primitive arrays instead of boxed :
val intArray = IntArray(1000 )
Execution Speed
Tail recursion :
tailrec fun factorial (n: Int , acc: Int = 1 ) : Int =
if (n <= 1 ) acc else factorial(n - 1 , n * acc)
Coroutine pooling (automatic with structured concurrency)
Best Practices
1. Always Use Structured Concurrency
coroutineScope {
val result = async { fetchData() }
}
GlobalScope.launch { fetchData() }
2. Null Safety Over Exceptions
val user = repository.findUser(id)
?.let { updateUI(it) }
?: showNotFound()
val user = repository.findUser(id)!!
3. Resource Management
File("data.txt" ).bufferedReader().use { reader ->
reader.readLines()
}
try {
} finally {
resource.close()
}
Security Considerations
Input Validation data class SecureUserInput (val email: String) {
init {
require(email.contains("@" )) { "Invalid email" }
require(email.length <= 254 ) { "Email too long" }
}
}
Secure Storage expect class SecureStorage {
suspend fun store (key: String , value: String )
suspend fun retrieve (key: String ) : String?
}
Network Security
val client = HttpClient {
install(Auth) {
bearer {
loadTokens { getBearerTokens() }
}
}
}
Testing Strategy Category Target Tools Unit Tests 80% Kotest, MockK, runTest Integration Tests 15% Kotest, testcontainers UI Tests 5% Compose Test
Works Well With
moai-foundation-trust (TRUST 5 quality gates)
moai-foundation-security (Enterprise security)
moai-foundation-testing (Testing strategies)
moai-cc-mcp-integration (MCP integration)
moai-essentials-debug (Debugging)
For Complete Information
Changelog
v4.0.0 (2025-11-13): Refactored to Progressive Disclosure with comprehensive examples.md and reference.md
v3.0.0 (2025-03-15): Added KMP and multiplatform patterns
v2.0.0 (2025-01-10): Basic Kotlin patterns and best practices
v1.0.0 (2024-12-01): Initial release