Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/16035892/

Work experience

Android developer

from 08.2022 to now (4 years 4 months)
Hillside IT Consulting Group, Remote (IT)

- Designed and delivered 12+ Android apps with a combined 1M+ downloads and 4.8★ Play Store rating.
- Led the migration from XML UI to Jetpack Compose, reducing UI build time by 35% and improving maintainability.
- Implemented Clean Architecture + MVVM, decreasing crash rates by 42% and improving feature scalability.
- Integrated REST and GraphQL APIs via Retrofit + OkHttp + Ktor, ensuring sub-100 ms response consistency.
- Utilized Kotlin Coroutines + Flow to enhance async handling, cutting UI freeze incidents by 60%.
- Built offline-first experiences with Room + DataStore, enabling 100% usability without network.
- Secured apps with OAuth2 + JWT, achieving 0 high-severity vulnerabilities in penetration tests.
- Configured Gradle KTS build pipelines and modularized codebase, reducing APK size by 25%.
- Deployed push notifications, analytics, and dynamic links via Firebase, increasing retention by 18%.
- Integrated Crashlytics + Performance Monitoring, lowering ANR occurrences by 55% quarter-over-quarter.
- Automated CI/CD using GitHub Actions + Fastlane, cutting release time from 40 min → 8 min.
- Implemented in-app payments and subscriptions (Play Billing v6), generating +27% revenue growth.
- Collaborated with designers using Figma tokens and MotionLayout, achieving pixel-perfect responsiveness.
- Conducted security audits with ProGuard/R8, enforcing encrypted SharedPreferences and SSL pinning.
- Mentored 4 developers and reviewed 150+ pull requests, increasing code quality metrics by 30%.
- Deployed apps to production using Firebase App Distribution and Play Console staged rollouts.
- Partnered with backend and DevOps teams to optimize API payloads and deployment flow.
- Delivered 99.9% crash-free sessions and reduced startup time by 1.2 s across flagship apps.
- Documented architecture decisions (ADR) and best practices for Kotlin Multiplatform modules.
- Awarded “Top Mobile Engineer of the Year 2024” for exceeding delivery KPIs and code excellence.

- Tech Stack: Kotlin, Java, Jetpack Compose, AndroidX, Koin/Hilt, MVVM, MVI, Retrofit, OkHttp, Ktor, Room, DataStore, Firebase (Auth, FCM, Crashlytics, Analytics), GraphQL, WebSockets, Gradle KTS, GitHub Actions, Fastlane, Docker, ProGuard/R8, Play Billing, SOLID, Clean Architecture.

Android engineer

from 03.2020 to 08.2022 (2 years 6 months)
Beyondsoft, Remote (IT)

- Developed and maintained enterprise-level Android apps with 500K+ monthly users and 99.98% crash-free sessions.
- Refactored legacy Java apps to Kotlin + MVVM architecture, reducing technical debt by 60%.
- Architected modular codebases using Clean Architecture and multi-module Gradle projects, cutting build time by 35%.
- Implemented offline-first data sync using Room + WorkManager, improving reliability in low-connectivity regions by 45%.
- Integrated REST APIs with Retrofit + OkHttp + Coroutines, achieving consistent sub-100 ms response latency.
- Enhanced UI performance with Jetpack Compose, reducing layout rendering time by 30%.
- Built real-time notifications and analytics through Firebase Cloud Messaging + Analytics, boosting engagement by 20%.
- Deployed in-app purchase systems (Google Play Billing), increasing monetization efficiency by 25%.
- Strengthened app security via SSL pinning, ProGuard/R8, and Encrypted SharedPreferences, achieving 0 major vulnerabilities.
- Implemented CI/CD pipelines in GitLab + Fastlane, reducing manual release effort by 80%.
- Monitored performance with Crashlytics, Firebase Performance, and New Relic, cutting ANR incidents by 50%.
- Automated testing with JUnit, Espresso, Mockito, maintaining 90%+ coverage across key modules.
- Integrated OAuth2.0 / JWT authentication, ensuring secure communication across backend microservices.
- Collaborated with backend teams to optimize payloads and reduce API size by 22%, improving loading speed.
- Implemented dark-mode theming and accessibility standards (WCAG), enhancing UX scores by 33%.
- Conducted code reviews and pair programming for 6 engineers, improving defect detection rate by 40%.
- Contributed to internal Android libraries for network, UI, and analytics, reused in 10+ client projects.
- Led sprint planning and release management for 3 product lines, ensuring 100% delivery adherence.
- Presented performance audit reports that led to 28% improvement in energy consumption on mid-tier devices.
- Recognized with the 2022 Engineering Excellence Award for innovation in modular app design and reliability.

- Tech Stack: Kotlin, Java, Jetpack Compose, AndroidX, MVVM, Clean Architecture, Room, WorkManager, Coroutines, Retrofit, OkHttp, Firebase (FCM, Analytics, Crashlytics), Google Play Billing, GitLab CI/CD, Fastlane, JUnit, Espresso, Mockito, ProGuard/R8, OAuth2, JWT, SOLID Principles.

Full stack developer

from 07.2016 to 02.2020 (3 years 8 months)
CNT Management Consulting, Remote (IT)

- Delivered 8+ Android and web applications for enterprise clients in finance, logistics, and healthcare, achieving 99.9% uptime.
- Developed native Android apps in Java and Kotlin, later migrating to modern MVVM + Clean Architecture.
- Built REST APIs using Node.js + Express and integrated them into Android clients with Retrofit and OkHttp.
- Implemented Room database and SQLite caching, enabling full offline mode and reducing network load by 40%.
- Created modular UI components and adapters for dynamic layouts, cutting UI development time by 25%.
- Optimized API response and caching logic, improving data load speed by 1.6 s on average.
- Integrated Firebase Auth, Analytics, and Push Notifications, boosting daily active users by 30%.
- Designed data dashboards and analytics features in Android apps using MPAndroidChart and Chart.js.
- Collaborated with backend engineers to ensure seamless API communication and JSON schema consistency.
- Implemented JWT/OAuth2 authentication, reducing security issues by 70%.
- Automated builds and testing via Jenkins + Gradle, decreasing release time from 1 h → 15 min.
- Integrated Google Maps SDK and Location Services, enabling real-time route tracking for logistics clients.
- Refactored legacy Java codebases to Kotlin, reducing crash reports by 45% and improving maintainability.
- Designed Material Design UI/UX, increasing app usability scores by 20% in client evaluations.
- Led feature planning and sprint reviews across cross-functional teams, ensuring 100% delivery consistency.
- Conducted unit and UI testing (JUnit, Espresso), improving release stability by 35%.
- Mentored junior Android developers, improving onboarding efficiency by 50%.
- Implemented monitoring with Firebase Crashlytics and Logcat pipelines, reducing bug triage time by 60%.

- Tech Stack: Kotlin, Java, Android SDK, Jetpack (Room, ViewModel, LiveData, WorkManager), Node.js, Express, Firebase (Auth, Crashlytics, Analytics, FCM), Retrofit, OkHttp, SQLite, Jenkins, Gradle, MPAndroidChart, Google Maps SDK, JWT, OAuth2, Material Design, Clean Architecture, SOLID Principles.

Education

Kharkiv Technological University "IT STEP"

Computer Science, Other countries
Higher, from 2010 to 2015 (5 years)

Bachelor’s Degree in Computer Science

Additional education and certificates

No additional education or certificates.

Knowledge and skills

• Communicability
• JavaScript
• HTML
• CSS
• Git
• React
• Node.js
• GitHub
• TypeScript
• MySQL
• SQL
• SASS
• Figma
• PHP
• PostgreSQL
• Bootstrap
• MongoDB
• JQuery
• Redux
• Docker
• Website development on Shopify
• WordPress
• IOS development
• Android Studio
• C#
• C/C++
• Symfony
• Python
• Material UI
• Tailwind CSS
• Vue.js
• Next.js
• Express.js
• Cloudflare
• TypeORM
• Django
• AngularJS
• Docker Compose
• Azure DevOps Server
• Kubernetes
• Kotlin
• REST API
• React Redux
• React Native
• JQuery Mobile
• ASP.NET Core
• Golang
• Shopify CLI
• Blockchain
• CI/CD

Language proficiencies

• English — fluent
• Ukrainian — fluent

Additional information

Motivated and detail-oriented Senior Backend Engineer with 9+ years of experience building fast, reliable, and scalable systems.
Strong focus on clean architecture, performance optimization, and delivering real business value through code.
Known for technical depth, teamwork, and ownership, I take pride in transforming complex problems into elegant, high-impact solutions that inspire confidence and drive results.

My expected salary is $1,800–$3,500 per month, but it’s negotiable.

I can start work immediately.
Telegram: @NevaSpark