Арнольд

Arnold Vadiiants | Senior Android Engineer
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Remote
SUMMARY
Senior Android Engineer experienced in building large-scale consumer and enterprise applications. Strong expertise
in Kotlin, Jetpack Compose and Android architecture, with experience in high-traffic streaming, enterprise
mobility/security and complex UI systems. Experienced in technical leadership, architecture and mentoring.
SKILLS
• Kotlin, Java, Android SDK, Jetpack Compose, Coroutines, Flow, Jetpack Navigation, Clean Architecture,
MVVM/MVI, Modularization, SOLID, Hilt, Koin, Retrofit, Ktor, Room, DataStore, JUnit, Mockito, Espresso
• C++ NDK, Protobuf, Android Enterprise, Samsung Knox, CI/CD, KMP, Google Gemini, Claude Code, Codex
WORK EXPERIENCE
EPAM Systems: Senior Android Engineer | Sep 2018 – Present (8 yrs)
o Disney JioHotstar | Senior Android Engineer | June 2022 – Feb 2026
• Developed and maintained core Android features for a large-scale streaming platform with 1B+ downloads.
• Designed and implemented ~80% of Android ad formats, owning UI, business logic, integrations, and analytics.
• Built complex custom advertising UI and animations with Jetpack Compose, creating reusable components.
• Investigated and resolved complex, hard-to-reproduce issues across application and underlying library layers.
• Designed reusable modules and internal libraries using Kotlin, Coroutines, Flow, Hilt, Compose, and KMP,
improving code reuse and consistency while accelerating feature development.
• Contributed to modularization and architecture modernization across the application, reducing technical debt.
• Collaborated with Product, Design, Backend, Web, iOS, and QA teams from tech evaluation to implementation.
o BlackBerry Enterprise Mobility Management | Android Engineer | Sep 2018 – June 2022
• Developed enterprise-grade Android security and device-management solutions used by corporate customers.
• Implemented IT policies, device security, root/malicious activity detection, sideloaded app detection.
• Developed native Android libraries and platform components using C++, NDK, and JNI, working extensively
with Device Security API and Samsung Knox APIs.
• Designed and implemented functionality from scratch while refactoring and modernizing legacy components.
• Developed unit/integration/E2E tests and C++ gtests, improving component reliability and stability.
• Participated in architecture discussions, tech investigations, code reviews and engineer mentoring/onboarding.
Appus Studio: Android Developer | Oct 2016 – Sep 2018 (2 yrs)
• Delivered multiple Android applications for international clients across e-commerce, media, utilities, and
lifestyle domains, taking ownership of Android development from requirements through implementation.
• Contributed to architecture decisions, code reviews, and technical discussions across multiple projects.
Initiative Technology: Android Developer | Feb 2016 – Nov 2016 (10 mos)
• Developed Android applications in media and restaurant POS domains. Implemented new features, integrated
backend APIs, and participated in full application lifecycle from development to release.
LANGUAGES
• English (B2+) • Ukrainian • Russian
EDUCATION
Kharkiv National University of Radio Electronics | Kharkiv, Ukraine
• Master's Degree, Economic Cybernetics and Management of Economic Security (2019-2021)
• Master's Degree, Applied Mathematics (2013-2019