Владислав

Vladislav Piontak
Android developer

Summary

Android developer with over 3 years of experience, specializing in designing and
building applications from the ground up to full release. Skilled in developing scalable,
maintainable, and high-performance solutions. Proficient in architectural design, API
integration, and UI development, with a strong understanding of modern Android
Personal details development frameworks and best practices.

[open contact info](look above in the "contact info" section) Employment
[open contact info](look above in the "contact info" section) Android Developer Feb 2021 - Jan 2024
FiveSystemsDevelopment, Vinnytsia
Worked on several significant projects, including for a pharmaceutical company,
Vinnytsia, Ukraine advanced sports industry platforms, and a line of gaming products
Designed the architecture, implemented, and supported applications throughout
their entire lifecycle, including version updates on release
[open contact info](look above in the "contact info" section) Integrated third-party services, including Google Maps, Firebase, LiqPay, and
Google Pay
Developed user-friendly interfaces using Сustom Views and Jetpack Compose,
enhancing app usability
Languages Managed the full release cycle on Google Play, ensuring smooth deployment and
updates
Optimized app performance, reducing load times by 30%
English B1
Refactored a legacy codebase using modern development methodologies,
achieving a 35% reduction in crashes and improved maintainability.
Ukrainian Native
Conducted code reviews and mentored junior developers to improve team
performance.
Skills Kotlin, Retrofit, Jetpack Components, Firebase Api, Google Services, Room, MVVM,
Koin, Hilt, Kotlin Coroutines, Flow, JSON , Android SDK, RxJava, OOP, CameraX,
Kotlin, Java, Android SDK BLE, Google Maps, Picasso, Glide, LiveData

Google Maps, Google Pay Android, IOS developer Apr 2024 - Feb 2025
Freelance Projects
Picasso, Glide, Coil Worked in collaboration with a programmer on freelance projects, primarily developing
mini-games and small applications, including utility, entertainment, and casual gaming
Retrofit, OkHttp, RestAPI, Firebase applications
API, Gson Developed applications for both Android and iOS platforms
Developed a fitness tracking app with BLE smartwatch synchronization,
Kotlin Coroutines, Flow, RxJava, increasing daily active users by 30%.
LiveData Optimized app performance and ensured a smooth user experience.

Room, SQLite Kotlin, Retrofit, Jetpack Compose, Firebase API, Room, MVC, Kotlin Coroutines, Flow,
Android SDK, OOP, Glide, ExoPlayer, iOS (Swift, UIKit, iOS SDK)
Koin, Hilt, Dagger 2

Jetpack - Components, Compose, Education
Navigation Component

CameraX, BLE, WorkManager, Master's degree Sep 2024 - Present
ExoPlayer Donetsk National University, Vinnytsia
Specialty: 122 Computer Science
OOP, Design Patterns, Clean Educational Program: Computer Data Processing Technologies and Neural Networks
Architecture
Bachelor's degree Sep 2017 - Jun 2021
MVVM, MVP, MVI, MVC Donetsk National University, Vinnytsia
Specialty: 122 Computer Science
SOLID, DRY, Scrum

GIT, Android Studio, Material Design 3 Courses

Strum Dec 2024
Management in product-based IT Link to certificate