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Android developer
https://play.google.com/store/apps/developer?id=VOLOSHYN+SERHII

PROGRAMMING LANGUAGES: SUMMARY
Android & Backend Engineer with over 5 years of experience in developing,
Kotlin, Java maintaining, and optimizing mobile applications and server-side solutions. Deep
TECHNOLOGIES: knowledge of Kotlin, Java, and the Android SDK, with proven expertise in
Jetpack Compose, Kotlin Multiplatform (KMP) for cross-platform iOS/Android
Core Android Technologies: development, architectural patterns (MVVM, MVI), Clean Architecture, and
Android SDK, Jetpack Compose, SOLID principles. Strong hands-on experience in building Python backend
Coroutines, Flows, Room, RxJava servers containerized with Docker and implementing advanced AI capabilities,
Google APIs (Maps, Billing), including Retrieval-Augmented Generation (RAG) architectures, custom Chat AI
ExoPlayer (Media3), Bluetooth (BLE), systems, and Image Detectors. Successfully integrated RESTful APIs, third-
Camera X, Firebase, OpenGL(shaders) party libraries (including Google Play Billing, advertising SDKs), and worked
Architecture & Patterns: with Bluetooth Low Energy (BLE).
MVVM, MVI, Clean Architecture, Projects in ZIMAD:
SOLID 1. Advertising Library
Networking & Data: Description: Library that unifies and simplifies integration of multiple
RESTful APIs, JSON, Retrofit2, Gson, advertising SDKs (AdMob, FAN, ironSource, AdColony, AppLovin, etc.) in
WebSocket API, AWS Services Android apps.
Testing: Technologies: Kotlin, Android SDK, Coroutines.
Role: Implemented ad network adapters, and ensured compatibility and
Unit Testing (JUnit, MockK)
performance.
UI Testing (Compose UI Test)
2. OpenGL Graphics Library
Dependency Injection: Description: A high-performance graphics library designed to simplify the
Dagger 2, Hilt, Koin management of GLSL shaders and rendering pipelines within Android
Tools & Platforms: applications.
Android Studio, Git, Jira, Figma Technologies: Kotlin, Android SDK, Coroutines, OpenGL ES 3.0, GLSL.
Role:Engineered the core OpenGL rendering engine for custom UI effects and
Google Play Console
graphics processing. Implemented high-level wrappers for complex GLSL
CI/CD:
shaders, making them accessible for non-graphics developers. Ensured
Experience in setup and usage seamless integration with Android's SurfaceView and TextureView components.
Development Methodologies:
Scrum, Kanban Projects in GlobalLogic:
LANGUAGES 1. Medical Device Control (BLE)
Description: A mobile application for managing a medical device via BLE.
English: Upper Intermediate (B2) Displays key data on the user’s smartphone.
Technologies: Kotlin, Jetpack Compose, Android SDK, Clean Architecture,
Ukrainian: Native
Coroutines, Dagger 2, Retrofit2, BLE.
EXPERIENCE Role: Developed core functionality, including secure communication with the
medical device via BLE; implemented UI screens and data presentation logic.
Dec 2024 - Nov 2025 2. Audio Device Control (BLE)
Zimad Description: A mobile application used to control an audio device via Bluetooth
Android Developer Low Energy. Allows users to create, customize, and share presets over the
internet.
Sep 2020 - Nov 2024 Technologies: Kotlin, Java, Android SDK, MVVM, Room, Coroutines, RxJava
GlobalLogic Retrofit2, Hilt, BLE.
Android Developer Role: Improved BLE communication and preset management; refactored
existing Java code to Kotlin; fixed bugs and optimized performance; prepared
EDUCATION and published new app versions on Google Play.
National University of Radio 3. Vehicle Tracking System
Electronics Real-time tracking app with Google Maps and OpenStreetMap integration.
Master's degree, “Analytic of
Technologies: Kotlin, Jetpack Compose, MVI , Room, Coroutines, Retrofit 2,
computer systems and
Dagger, Google Maps/OSM.
networks”
Role: Developed core modules: live tracking, trip history, reporting, and vehicle
management. Implemented offline-first data handling using Room and
optimized map service integration.