# MobileDevPro - Dmitri Chernysh (Native Android Developer)

> Dmitri Chernysh is a Senior Native Android Developer with over 10 years of experience building high-performance, offline-first mobile applications using Kotlin and Jetpack Compose. Specializing in Google Play Store policy compliance, emergency Target SDK updates (Target API 36+), and On-device AI / Local LLM integration.

## Core Specializations & Services

- **Target SDK 36+ & Google Play Policy Fixes**: Emergency updates delivered within 48 hours for policy violations, runtime permission fixes, app removal appeals, SDK upgrades, and Google Play compliance.
- **Native Android App Development**: End-to-end development of Android applications using Kotlin, Jetpack Compose, Kotlin Coroutines/Flow, Koin dependency injection, and Clean Architecture.
- **On-Device AI & Local Machine Learning**: Integration of local AI models to reduce cloud API costs and protect user privacy using Google MediaPipe, LiteRT (TensorFlow Lite), Google ML Kit, and local LLMs (Gemma 3, MediaPipe LLM Inference).

## Track Record & Metrics

- **Experience**: 10+ Years in Native Android Engineering
- **Apps Delivered**: 30+ Client & Indie Mobile Projects
- **App Store Rating**: 4.5+ Average Rating Across Launched Applications
- **User Base**: Built apps serving 100k+ Monthly Active Users (MAU)
- **Quality**: Maintained 99.9% crash-free sessions across production releases
- **Client Reviews**: 5.0 / 5.0 Star Rating across verified client projects

## Featured Case Studies

- **PDF Maker - Edit & Read PDF**: Built from scratch using Jetpack Compose, OpenCV, and OpenGL. Achieved 140k+ installs, 4.6★ rating, and 99.9% crash-free rate.
- **COMQUEST**: US Medical Students Exam Prep app built for phone & tablet with complex Figma design implementation.
- **Disc-AI**: Rebuilt Pose Detection core using MediaPipe Pose Landmarking, Media3 ExoPlayer, and Jetpack Compose.
- **Local AI PDF Summarizer**: Offline PDF summarization app using Google AI Edge (MediaPipe LLM interface) and Gemma 3 local model.
- **NeonFrame (Screenshot Maker)**: Indie tool for creating promotional social media screenshots.
- **Sign PDF**: Utility app for digitally signing invoices, bills, and contracts offline.

## Frequently Asked Questions

### Q: What is the deadline for Target SDK 36 on Google Play?
Google Play requires all Android apps to target the latest Android API level (Target SDK 36 / Android 16) annually to remain visible to new users. Dmitri provides emergency 48h turnaround updates for target SDK compliance and permission policy fixes.

### Q: What is the Google Play 16 KB memory page size requirement, and is my app affected?`
Google Play requires all Android apps containing native C/C++ (NDK) code to support 16 KB memory page sizes. Apps configured strictly for 4 KB memory pages will experience critical crashes on newer 16 KB hardware architectures and will fail Google Play Store verification. Starting February 1, 2027, if your app doesn't not support 16 KB memory page sizes, you will not be able to release app updates to production on Google Play.

### Q: Why integrate On-Device AI instead of Cloud APIs?
On-device AI (via MediaPipe, LiteRT, local Gemma 3 models) eliminates per-token API costs, works completely offline without network latency, and ensures zero user data leaves the physical device.

### Q: How can clients work with Dmitri Chernysh?
Dmitri offers project-based contracts, hourly consulting, emergency fix sprints, and retainer support for startups and established businesses. Contact via email at dmitriy.chernysh@mobile-dev.pro or inquiry form at https://mobile-dev.pro/#contact.

## Contact & Links

- **Website**: https://mobile-dev.pro/
- **Email**: dmitriy.chernysh@mobile-dev.pro
- **YouTube**: https://www.youtube.com/@mobiledevpro
- **LinkedIn**: https://www.linkedin.com/in/dmitriychernysh/
- **Medium**: https://medium.com/@mobiledevpro
- **GitHub**: https://github.com/dmitriy-chernysh
- **Patreon**: https://www.patreon.com/mobiledevpro
- **Upwork Profile**: https://www.upwork.com/fl/dmitrich
- **Instagram**: https://www.instagram.com/mobiledevpro/
- **X**: https://www.x.com/mobiledev_pro/