Oleh

Oleh Senyk
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Telegram : @oleh_senyk | LiknedIn : [відкрити контакти](див. вище в блоці «контактна інформація»)

ABOUT ME
Skilled Android Developer with 4+ years of experience building high-performance mobile and TV applications.
Strong focus on Jetpack Compose, ExoPlayer, and scalable architectures (MVVM/MVI). Specialized in developing
Android TV apps with features such as custom video players, Widevine DRM, OTA updates, Bluetooth pairing, and
Wi-Fi management. Passionate about writing clean, maintainable Kotlin code and exploring modern Android
frameworks and tools. Experienced in direct client communication, Agile development, and end-to-end delivery.

WORK EXPERIENCE
DEC 2023 - ANDROID DEVELOPER (Perfsol)
CURRENTLY • Developed and maintained Android TV applications with advanced features such as
video streaming, Widevine DRM integration, custom ExoPlayer playback, and
dynamic UI using Jetpack Compose
• Built system-level components for Bluetooth remote control pairing, Wi-Fi
configuration, and call-handling features using Android Telecom APIs
• Designed and implemented new mobile apps from scratch using both Java and Kotlin,
focusing on performance, modularity, and Clean Architecture principles
• Provided long-term support for legacy codebases, including bug fixing, performance
optimization, and refactoring to modern standards
• Contributed to end-to-end development, from gathering requirements to release and
post-release support
• Proactively explored and studied Kotlin Multiplatform (KMP) and Swift during off-
project hours to broaden cross-platform and iOS integration skills
• Stack: Kotlin, Java, Jetpack Compose, ExoPlayer, Hilt, Retrofit, Bluetooth APIs, Wi-Fi
Manager, Telecom, Room, Clean Architecture (MVVM/MVI), Firebase,
PackageInstaller, DRM (Widevine), Android TV

AUG 2021 - ANDROID DEVELOPER (ProgressTech Ukraine)
SEPT 2023 • Started with supporting and maintaining a legacy media application: bug fixing,
stability improvements, and gradual modernization
• Took the initiative to introduce modern development practices, including Kotlin
Coroutines and Jetpack Compose, improving both code readability and
responsiveness
• As I gained more experience and proved my technical growth, I was assigned
increasingly complex tasks, including the full redevelopment of a core Android
application from scratch using modern architecture and best practices
• Proposed and implemented significant performance and structural optimizations
across the codebase
• Worked in-depth with low-level media APIs such as MediaMuxer, MediaCodec,
decoders, and encoders to handle complex audio/video processing and streaming
use cases
• Stack: Kotlin, Java, Coroutines, Jetpack Compose, Retrofit, Firebase, ExoPlayer, MVVM,
MediaMuxer, MediaCodec, Clean Architecture
MAR 2022 - ANDROID DEVELOPER (Act for Ukraine)
MAY 2022 • Volunteering by Android software development in fund Act for Ukraine. Development
news Android application for spreading events in Ukraine.

MAR 2021 - ANDROID DEVELOPER (HIWeber)
AUG 2021 • Desktop and Android application development. Applications logic design and
implementation. Work with the UI layer
• Fixing bugs, implementing new technical features, sometimes refactoring
implemented
• features, adding analytics tools in Android application, building domain entities
relationships in application architecture, SQLite implementing in the application
(Android Room API)

OCT 2020 - ANDROID DEVELOPER (Parimatch Tech Academy)
MAR 2021 • During this time, I came across modern technologies and their practice in real-case
projects.
Also, I communicated with another student with the purpose to implement our client-server
application which improved my soft skills. I performed the following tasks:
- Implement client-server authorization process via GitHub
- Implement data transferring via RxJava/Coroutines
- Setup Firebase analytics in some UI interactions
- Implement a tech task according to MVP/MVVM approach setup DI via Dagger 2
- Implement basic UI via RecyclerView, Adapter, ViewHolder

EDUCATION

2021 - 2023 Kyiv National Economic University Vadym Hetman
• Master’s in Economic Cybernetics
2017 - 2021 Kyiv National Economic University Vadym Hetman
• Bachelor’s in Economic Cybernetics

SKILLS
− Languages & Paradigms: Kotlin, Java, Coroutines, RxJava2
− UI & Frameworks: Jetpack Compose, Android Jetpack, Android SDK
− DI & Architecture: Hilt, Dagger 2, MVVM, MVI, MVP, Clean Architecture, SOLID
− Tools & Libraries: Retrofit 2, Firebase, ExoPlayer, Gradle, Git
− Databases: Room (SQLite), Firestore, SQL, NoSQL
− Platform Features: Bluetooth, Wi-Fi, Android TV, Telecom API
− Multiplatform: Kotlin Multiplatform (KMP)

LANGUAGES
• Ukrainian Native
• English Upper-intermediate