Skill Assessments This user has not passed any tests yet Languages English - Intermediate * ReportPeople also viewed [![Alexandre Silva](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/05/avatar_60298_1779685427.jpg) Alexandre Silva Senior Software Engineer](https://jobicy.com/u/id60298.md) * [![Salvador Rodriguez](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70446_1783966227.jpg) Salvador Rodriguez Backend Software Engineer](https://jobicy.com/u/id70446.md) * [![Bui Hai Minh](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70017_1783741472.jpg) Bui Hai Minh IT Specialist | Fullstack Developer](https://jobicy.com/u/id70017.md) * [![Sergi Cosialls](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70946_1784116832.jpg) Sergi Cosialls AI Solutions Architect | Full-Stack Product Builder](https://jobicy.com/u/id70946.md) * [![Lucas Jesus](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_69893_1783637232.jpg) Lucas Jesus Software Engineer](https://jobicy.com/u/lucassjesus.md) * [![Helder Cavalcante Filho](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_69908_1783650956.jpg) Helder Cavalcante Filho Fullstack Developer](https://jobicy.com/u/id69908.md) * [![Mykhailo Vasyliev](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70390_1783958117.jpg) Mykhailo Vasyliev Engineering Manager / Lead Mobile Developer](https://jobicy.com/u/id70390.md) * [![Akhmad Ridlo Rifa](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70256_1783927970.jpg) Akhmad Ridlo Rifa'i Backend Developer](https://jobicy.com/u/id70256.md) [All talent ↗](https://jobicy.com/talent.md) * [Overview](#overview) * [Portfolio](#portfolio) ## About Me I am an Android and iOS developer with hands-on experience building and maintaining native mobile applications across Android, iOS, and Windows desktop environments. I work primarily with Kotlin, Swift, Java, C#, and .NET, and I focus on creating reliable, high-performance apps with clean architecture and maintainable code. My background includes developing utility, productivity, and content-driven applications, with strong attention to battery efficiency, memory optimization, and smooth user experience. I have experience integrating Firebase services, REST APIs, analytics, crash reporting, and background processing tools such as WorkManager and AlarmManager. I value scalable architecture, including MVVM, SOLID principles, and Clean Architecture, and I enjoy turning ideas into polished products that are stable in production. I am comfortable working on the full app lifecycle, from UI/UX implementation and feature development to deployment, monitoring, and long-term support. I am open to opportunities where I can contribute as a mobile developer and continue growing in cross-platform and native application development. ## Skills ### [SQL](https://jobicy.com/talent/sql.md)[Java](https://jobicy.com/talent/java.md)[CI CD](https://jobicy.com/talent/ci-cd.md)[Git](https://jobicy.com/talent/git.md)[iOS](https://jobicy.com/talent/ios.md)[REST APIs](https://jobicy.com/talent/rest-apis.md)[Kotlin](https://jobicy.com/talent/kotlin.md)[GitHub Actions](https://jobicy.com/talent/github-actions.md)[Swift](https://jobicy.com/talent/swift.md)[Android](https://jobicy.com/talent/android.md)[Firebase](https://jobicy.com/talent/firebase.md)[Navigation](https://jobicy.com/talent/navigation.md)[MVVM](https://jobicy.com/talent/mvvm.md)[SOLID](https://jobicy.com/talent/solid.md)[Jetpack Compose](https://jobicy.com/talent/jetpack-compose.md)[Retrofit](https://jobicy.com/talent/retrofit.md)[Coroutines](https://jobicy.com/talent/coroutines.md)[WPF](https://jobicy.com/talent/wpf.md)[C#](https://jobicy.com/talent/c-sharp.md)[ROOM](https://jobicy.com/talent/room.md)[OkHttp](https://jobicy.com/talent/okhttp.md)[Firebase Crashlytics](https://jobicy.com/talent/firebase-crashlytics.md)[Datastore](https://jobicy.com/talent/datastore.md)[Cloud Firestore](https://jobicy.com/talent/cloud-firestore.md)[WinForms](https://jobicy.com/talent/winforms.md)[ProGuard](https://jobicy.com/talent/proguard.md)[ViewModel](https://jobicy.com/talent/viewmodel.md)[LiveData](https://jobicy.com/talent/livedata.md)[SharedPreferences](https://jobicy.com/talent/sharedpreferences.md)[XML Layouts](https://jobicy.com/talent/xml-layouts.md) ## Experience Android Developer @ Battery Guardian – Battery Saver App Dec 2015 - Dec 2016 Built a battery saver app that shows battery usage per app, health status, charge cycles, and background usage optimization. Integrated BatteryManager and UsageStatsManager for real-time data, and used AlarmManager and WorkManager for smart charging reminders and idle-time control. Designed dashboards with Jetpack Compose and charts for battery health trends, and implemented a lightweight widget and low-resource notification service. Android Developer @ Magazine Lockscreen Application Dec 2015 - Dec 2015 Developed a magazine-style lockscreen app using Jetpack Compose, REST APIs, Room, DataStore, WorkManager, Glide, and Firebase Analytics. Built a swipeable interface, background content scheduler, caching layer, and smooth image loading with a focus on low memory usage and clean architecture. Android Developer @ Cleanup Your Phone – Utility App Apr 2016 - Apr 2017 Created an Android utility app for junk file cleaning, RAM optimization, and storage monitoring. Implemented cache cleaning, file selection, periodic background tasks, in-app tips, and memory leak detection using WorkManager, Room, ViewModel, Firebase Analytics, Glide, and LeakCanary. Android Developer @ Alarm Clock App Apr 2016 - Apr 2017 Developed a customizable alarm clock app with recurring alarms, smart snooze, bedtime reminders, and sound and vibration settings. Used AlarmManager, BroadcastReceiver, Room, LiveData, Jetpack Compose, and foreground services to ensure reliable triggering and interactive notifications. Android Developer @ Wallpapers Gallery – Android Application Apr 2016 - Apr 2017 Built a wallpaper app with categorized collections, smooth browsing, downloading, and wallpaper setting features. Implemented responsive Jetpack Compose UI, REST API integration, lazy loading, pagination, Glide caching, Room and DataStore persistence, WorkManager background tasks, and Firebase Analytics tracking. Android Developer @ Flashlight Utility App – Android Application Apr 2017 Built a lightweight flashlight app with fast response time, gesture-based activation, runtime permissions, adaptive icons, and Firebase Crashlytics monitoring. Used Camera2 API, Jetpack Compose, and Material Design to deliver a minimal and reliable user experience. Android Developer @ Simple Alarm Clock – Android Application 2017 - 2018 Developed a reliable alarm clock app with multiple alarm types, recurring schedules, smart snoozing, bedtime reminders, and modern UI. Used AlarmManager, BroadcastReceiver, Room, ViewModel, WorkManager, and foreground services to support stable performance and low battery impact. iOS and Android Developer @ English 90000 Words & Pictures 2017 - Present Developed and maintained native mobile applications for iOS and Android using Swift, Kotlin, Java, and C++. Integrated Firebase services, tracked performance through Google Play Console, and supported the full app lifecycle from concept and UI/UX to deployment and long-term maintenance. ## Education No education data available. Portfolio not available. Services not available.