Євген

Eugene (Yevhen) Tsot
Senior Android Engineer | Software Developer | Team Lead
[відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)

@eugnt

[відкрити контакти](див. вище в блоці «контактна інформація») (WhatsApp)

Professional Summary
Senior Android Engineer with 15+ years of hands-on experience in mobile development and over 20 years in IT. Skilled in
Kotlin, Java, and modern Android architecture patterns. Strong background in leading development teams, designing scalable
applications, and integrating with IoT and cloud services. Currently expanding expertise in Backend development and exploring
AI integration into the apps.

Technical Skills
• Languages: Kotlin, Java, SQL, RxJava, (some knowledges in JavaScript, PHP, C/C++, ObjectiveC/Swift)
• Mobile: Android SDK, TV and Google Watch SDKs, Jetpack, Jetpack Compose, Coroutines, MVVM /MVP/MVI, Clean
Architecture

• Tools & Libraries: Retrofit/Apollo, Room, DI (Dagger, Hilt, Koin), Firebase, OkHttp, Git, Jenkins

• Databases: SQLite, Realm, MySQL, Oracle

• Other: IoT (BLE, MQTT), Unit/Integration Testing, Agile, Jira/Trello/similar, Confluence/Notion

• Learning: Spring Framework, AI/LLMs

Education
• 2002-2004 Computer Academy STEP, Software Development

• 1998-2003 Master’s Degree in Finance, Dnipro National University

Languages
• English Upper Intermediate (B2+)

• Russian, Ukrainian Native

Selected Projects
Healthcare App (2025 - 2026)
Project Description: A healthcare-focused Android application for managing wireless earbuds that measure heart rate and other
biometric data
Technologies: Android SDK, Android Studio, Kotlin, Retrofit, MVVM, Hilt, Bluetooth/BLE, MQTT, protobuf, Jetpack
Compose, Gemini AI agent, Claude Code AI
Role: Senior Software Engineer / Senior Android Developer.
As a Senior Android Developer, I worked on maintaining and enhancing an Android healthcare application for wireless
smart earbuds that measure heart rate and other biometric data. I updated and redesigned application screens using Jetpack
Compose, improved app stability and performance, and supported Bluetooth/BLE device integration with reliable data
exchange via MQTT and Protocol Buffers. I contributed to an MVVM-based architecture with Hilt and Retrofit,
collaborated with hardware and backend teams, and focused on delivering a scalable, production-ready mobile solution
with a strong emphasis on code quality and user experience.

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Earth Stream TV (2025)
Project Description: Android TV and Amazon Fire TV apps for media content.
Technologies: Kotlin, Jetpack Compose for TV, Android and Amazon Fire TV, Multimodule, Clean Architecture, MVVM, Unit
Testing, Hilt, Coroutines and Flow, Claude Code AI
Role: As a Senior Android Engineer, I led end-to-end development of a TV application for Android TV and Amazon Fire TV,
built from scratch using Kotlin and Jetpack Compose for TV. Ensured full platform compatibility and delivered a robust
media content experience for users.
Links: Amazon

App Generator (Constructor) (2024-2025)
Project Description: A Java/Kotlin-based system that allows rapid generation of Android applications based on templates and
configuration files. Useful for clients needing customizable, white-label apps.
Technologies: Kotlin, Java, Retrofit, Clean Architecture, MVVM, Hilt, Compose, KotlinPoet/JavaPoet
Role: As a Senior Software Engineer and Senior Android Developer, I spearheaded the development of the app generator
(constructor) from scratch, enabling users to create Android apps based on customizable templates. I implemented core
functionalities, ensuring the system’s ability to generate white-label apps with predefined configurations. My
responsibilities included writing documentation and unit tests, delivering a robust and scalable solution that enhances app
development efficiency for clients.

Arlo Secure (2022-2023)
Project Description: Smart home security system supporting video doorbells, cameras, and other smart devices.
Technologies: Kotlin, Java, Retrofit, Dagger2, Clean Architecture, MVVM/MVP, BLE, MQTT, IoT, Amazon DynamoDb
Role: As a Senior Android Developer in a cross-functional team of approximately 20 Android developers, I contributed to the
Arlo Secure app, an award-winning smart home security system. I implemented key features such as Privacy Zones,
Activity Zones for cameras, and Smart Plans integration for the app, along with various smaller features. I conducted code
reviews, wrote unit tests, and resolved bugs, ensuring seamless interaction with IoT hardware like cameras and doorbells
using protocols such as MQTT/SSE, BLE, and WiFi.
Link: Google Play

Cozytouch (2022)
Project Description: App for managing smart household devices.
Technologies: Kotlin, Java, Retrofit, Koin, Room, Clean Architecture, MVVM, Unit Testing
Role: I served as a Senior Android Developer in a small team of three developers for the Cozytouch app, which enables the
management of smart household devices. My primary responsibility was implementing the maintenance area within the
app, enhancing user control over device management. I also handled bug fixing and developed smaller features, ensuring
the app’s reliability and performance through unit testing and adherence to MVVM and Clean Architecture principles.
Link: Google Play

Vlogbox TV Apps (2020-2022)
Project Description: Android TV and Amazon Fire TV apps for media content.
Technologies: Kotlin, Java, Leanback, Android and Amazon Fire TV, Jenkins, Retrofit
Role: As a Senior Android Engineer, I led the development of the Vlogbox TV applications for Android TV and Amazon Fire
TV, building them from scratch. I was responsible for implementing app features, ensuring compatibility with both
platforms, and managing the app publishing process on Google Play and Amazon stores. My work included leveraging
technologies like Leanback, WebView, and Jenkins, delivering a robust media content experience for users.
Links: Vlogbox, Google Play, Amazon

Workout App with Wear OS Support ( 2019 )
Project Description: Homeletics- an Android fitness app with Wear OS integration, allowing users to track workouts, monitor
heart rate, and receive training prompts directly on their smartwatch.
Technologies: Kotlin, Android SDK, Wear OS SDK, Room, LiveData, MVVM, Coroutines, Sensor APIs, Bluetooth APIs
Role: As a Senior Android Engineer, I enhanced the Android workout app with Wear OS support, implementing real-time
workout tracking, sensor data integration, and synchronization of progress between devices. Delivered a smooth wearable
experience to complement the mobile app.
Links: Google Play ( removed from Google Play at the moment)

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Allo (E-Commerce App) (2015-2016)
Project Description: E-commerce app for one of Ukraine’s largest online retailers.
Technologies: Java, RxJava, Retrofit, SQLite, Unit testing
Role: In my role as Android Team Leader for the Allo app, one of Ukraine’s largest e-commerce platforms, I oversaw a team of
four developers, guiding the implementation of the app and its features from scratch. I developed the app’s architecture,
coordinated with backend, QA, and iOS teams, and mentored two junior developers, fostering their growth while ensuring
high-quality code through reviews. My responsibilities also included bug fixing and ongoing support, contributing to a
seamless user experience on the marketplace platform.
Link: Google Play

Delivery App with Wear OS Support (2014–2015)
Project Description: Android mobile and Wear OS companion apps for a delivery company, enabling couriers to receive order
updates and route notifications directly on their smartwatches.
Technologies: Java, Android SDK, Wear OS SDK, Google Maps API, SQLite, MVP, Retrofit, Push Notifications
Role: As an Android Engineer, I developed both the main Android app and the companion Wear OS app, implementing order
tracking, delivery route updates, and real-time notifications on the watch. Focused on seamless synchronization between phone
and watch to improve courier efficiency.
Links: was under NDA (a well-known UK company)

Additional Projects
Over the years, I’ve contributed to many other Android applications, some of which are no longer available on Google Play due
to business or lifecycle decisions. These include fitness apps (Homeletics, Workout TV), media streaming apps (Music &
Podcasts TV), location-based safety tools (Guardyman, FamilyInSafe apps), social and lifestyle platforms (Kandid, Hyppic,
FishPictures, LifeInStyle apps), as well as niche solutions like e-commerce, chess game for TV, travel guides and travel app, and
more. Each project contributed to my growth in architecture design, team leadership, and real-world problem-solving. Earlier in
my career, I worked in the banking sector as a Database Developer, gaining hands-on experience with SQL, Oracle, and other
relational databases.

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