Arsany M.

I build Android apps that millions of people use. I'm a senior engineer on the team behind Hammel: 5M+ downloads, 1M+ daily users and a 4.6★ rating from almost 300K reviews. ✔ 6 years shipping production apps in Kotlin and Java ✔ 75+ Upwork jobs, 100% Job Success, Top Rated ✔ Clients in Saudi Arabia, the US, India, Spain, Honduras and Georgia ✔ One client has had me build 50+ apps for their company, and we're still working together WHAT I CAN DO FOR YOU • Build your app from idea to Google Play with Kotlin, Jetpack Compose and Clean Architecture • Rebuild an old or messy app from scratch (I've rebuilt two apps with 100K+ downloads each) • Find and fix the bugs and crashes that are hurting your ratings • Add the features you need: payments, login, Firebase or Supabase backend, push notifications, maps and live tracking, chat, video and audio player, background downloads, Bluetooth (BLE), camera, in-app ads • Business apps: point of sale (POS), kitchen display (KDS), invoice and ticket printing, reports, company-managed devices (Device Owner) • On-device AI: models that run offline on the phone (Custom Engine on Android GPU, Core ML on iOS) SELECTED WORK • Hammel | 5M+ downloads, 1M+ daily users File manager, browser and downloader in Jetpack Compose. I built background multi-download with pause and resume, one-tap downloading of video, audio, images and documents from links, full file management and a complete media player. • On-device AI in Hammel I trained a music and vocal separation model. It runs fully offline on the phone (Custom Engine on Android, Core ML on iOS) and powers the app's Remove Music and Remove Vocals features. • Nice One | Saudi e-commerce, 1M+ downloads Worked in the team on the Jetpack Compose UI and the Supabase backend. • Bible Study Tools, Audio Video | US, 100K+ downloads Rebuilt from scratch: Bible texts, books, hymns and sermons with a full media player, background playback and offline downloads. • Class 11 Maths NCERT Solutions | India, 100K+ downloads Rebuilt from scratch • BUSZ: Kerala Live Bus | India, 10K+ downloads Live bus tracking and trip planning in English and Malayalam. I joined as the only Android developer and built 10 apps for the company, including a driver app that tracks the whole trip with live location, an in-bus TV app showing passengers the current stop and arrival time with a full ad system, and apps for bus stations and branch managers. • Restaurant POS & KDS | Spain A complete pizza point-of-sale system connected to a kitchen display, with reports, invoices and ticket printing (Jetpack Compose + Supabase). • 50+ internal apps | Honduras, ongoing Apps that run the company's daily operations, including Hormuz Pass, which manages the company's entry and exit through the Strait of Hormuz. • Also: Koucher, a network-control app built on Android Device Owner mode (US), MateUp Chat & Date (10K+ downloads), a task manager (US), kids' bedtime stories (India), a shopping app for products from Brazil, and games and football apps (Georgia). TECH STACK Languages: Kotlin, Java UI and architecture: Jetpack Compose, XML, MVVM, MVI, MVP, Clean Architecture, Hilt, Koin Android: Coroutines, Flow, Media3/ExoPlayer, MediaSession, WorkManager, CameraX, BLE, Google Maps, YouTube API, Device Owner, Kotlin Multiplatform Backend and data: Retrofit, REST, GraphQL, Room, SQLite, Realm, Firebase (Auth, Firestore, FCM), Supabase, MySQL, SQL Server Integrations: payment gateways, authentication, push notifications, in-app ads, third-party SDKs On-device AI: MNN, Core ML, knowledge distillation, audio source separation Workflow: Git, GitHub, Agile/Scrum, testing, CI/CD, Google Play publishing HOW I WORK • Questions first, then a clear plan and timeline before I write any code • Regular updates and test builds you can install on your own phone • Clean, readable code, held to the same standard as my team's daily code reviews • You get the full source code, and I can publish the app to Google Play for you • Arabic (native) and English (fluent). Based in Cairo, with hours that overlap the Gulf, Europe and the US East Coast Send me your idea, your app link or the bug you're stuck on. I'll reply quickly with the questions that matter and a clear plan to get it done.