Further development of a framework for displaying vehicle UI elements for the Volkswagen Group.

• Library architecture for providing UI elements for vehicle-specific apps
• Documentation and release management
• Contact person for technical questions about the implementation
• Integration of dependencies via a dedicated Nexus
• Compose UI and XML base elements for apps
• Complex style overlaying for elements according to OEM specifications
• OEM-specific StyleProviders via LocalComposition in Compose
• Work with Android Auto-specific emulators, targets, and test vehicles
• Coordination, support, and reporting with OEM customers in German and English

• Kotlin
• Compose UI
• XML
• Gradle
• Nexus
• Java
• GitHub
• Jira
• Android Auto

Development of a framework for implementing business application modules based on Kotlin Multiplatform.

• Library architecture for providing important frameworks for business applications
• Documentation and release management
• Contact person for technical questions about the implementation
• Creation of CLI tools and Gradle plugins for setting up mobile components for business applications
• Integration of dependencies via a dedicated Nexus
• Kotlin Multiplatform with Compose UI for workflows
• Shared logic for controlling a workflow for mobile and Java clients
• Story mapping, Jira, and GitHub

• Kotlin
• Kotlin Multiplatform
• Compose UI
• Gradle
• CLI Tools
• Nexus
• Java
• GitHub
• Jira

Federal emergency information and news app.

• MVVM architecture
• Kotlin with Jetpack Compose, Coroutines, and dependency injection with Koin
• Renewal and replacement of legacy Java code with Kotlin
• Test automation with unit tests, Espresso, and MockK
• Code reviews following the four-eyes principle
• Static code analysis, including Lint
• Support for the QA team with manual testing
• Jira and GitLab

• Android
• Kotlin
• Jetpack Compose
• Coroutines
• Koin
• MVVM
• Java
• JUnit
• Espresso
• MockK
• Lint
• GitLab
• Jira

Mobile banking app for the German Sparkassen banks.

• MVVM architecture
• Kotlin, partly with Jetpack Compose, Coroutines, and dependency injection with Dagger 2
• Renewal and replacement of legacy Java code with Kotlin
• Test automation with unit tests, Espresso, and MockK
• Code reviews following the four-eyes principle
• Static code analysis, including Lint
• Support for the QA team
• Manual testing with TestRail
• Jira and GitLab

• Android
• Kotlin
• Jetpack Compose
• Coroutines
• Dagger 2
• MVVM
• Java
• JUnit
• Espresso
• MockK
• Lint
• TestRail
• GitLab
• Jira

Software for archiving and managing documents.

• Full-stack project with backend and frontend
• Angular
• TypeScript in the frontend with the Formly framework
• Kotlin in the backend with Spring Boot
• Google Cloud APIs: OAuth v2 and Kubernetes Engine API
• Complex user and role management

• Angular
• TypeScript
• Formly
• Kotlin
• Spring Boot
• Google Cloud APIs
• OAuth v2
• Kubernetes Engine API

App for explosive ordnance clearance.

• Kotlin
• Replacement of legacy code with new technologies
• Java
• Bluetooth connection to external GPS and detector devices
• BluetoothSocket
• Data processing using buffers
• Evaluation and display of measurement values
• Custom drawables and components

• Android
• Kotlin
• Java
• Bluetooth
• BluetoothSocket
• Buffer
• Custom Drawables

Companion app for children's smartwatch.

• Kotlin
• Backend communication via JSON REST API using Retrofit and OkHttp
• Firebase with custom service for background notifications
• Multiplatform project for mobile apps
• Java: rewrite of an existing third-party app
• UI and unit test suite with Mockito, MockK, and Espresso
• Google Cloud APIs: Firebase Push Messaging, Firebase Crashlytics, and Google Cloud Storage API

• Android
• Kotlin
• Java
• Retrofit
• OkHttp
• JSON REST API
• Firebase
• Firebase Cloud Messaging
• Firebase Crashlytics
• Google Cloud Storage API
• Mockito
• MockK
• Espresso

Application for retrieving and displaying product information.

• Electron framework
• Application for mobile devices and desktop
• Node.js and HTML

• Electron
• Node.js
• HTML
• Desktop App

App for delivering and documenting machines.

• MVVM architecture
• Kotlin with Coroutines
• Room database
• Custom data source manager with Single Source of Truth
• CameraX with PreviewView
• Jetpack Compose

• Android
• Kotlin
• Coroutines
• MVVM
• Room
• CameraX
• PreviewView
• Jetpack Compose
• Single Source of Truth