Vladimir Pilipenko

Product: T-Mobile Diagnostics app(system app)

Developed a national-scale Android application serving 20M+ users for diagnostics data collection and analysis. Led development from inception to a 100k+ LOC codebase. Designed and delivered 20+ modules supporting multiple data sources and collection levels. Responsible for feature design and development, data schema design, application configuration management, and implementation of scalable data processing solutions.

• Architecture: Applied MVVM architecture, Clean Architecture principles, and Dependency Injection (Dagger/Hilt), refactored monolithic codebase into modular architecture to build scalable, maintainable, and testable applications.

• Backend Integration: Used REST APIs, Retrofit, OAuth2, JSON serialization, secure network communication for support high data traffic on daily basis.

• Kotlin: Extensive use of Kotlin Coroutines, Flow, StateFlow, Null Safety, migrated Java codebases to Kotlin.

• Jetpack Compose: Developed modern declarative UI using Jetpack Compose, Material Design 3

• Components and APIs: Extensive experience with Room, WorkManager, Broadcast Receivers, Content Providers, DataStore, Location Services, and Telephony APIs.

• AI-Related Experience: Cursor AI, Claude Code, GitHub Copilot, OpenAI APIs, AI-assisted development workflows, prompt engineering, code generation, refactoring, automated documentation, and productivity optimization using LLM-based tools.

• Long-Term Application Quality & Stability: Maintained low crash and ANR rates across millions of devices using Firebase Crashlytics and a custom-built analytics framework for proactive app health monitoring.

• Unit Testing: Maintained high unit test coverage using JUnit and MockK to ensure code quality, reliability, and regression prevention.

• Leadership & Collaboration: Mentored and supported offshore development team of 3-5 Devs, collaborated with clients and management, gathered requirements, and drove feature delivery through the full software development lifecycle.

• Participated as a contractor in several projects on the development of applications on Android, main:
• Caterpillar project: Developed enterprise Android solutions for Caterpillar’s dealer sales platform - Cat Virtual Showroom, supporting customer engagement and sales enablement workflows. Contributed to architecture design, feature development, performance optimization, testing, deployment, and ongoing production support. Mentored junior developers and served as a primary technical contact for critical issues.
• Limited Brands project: Developed and enhanced the Victoria’s Secret Android application, delivering customer-facing features for a large-scale retail platform. Implemented modern Android solutions including dependency injection, automated UI testing, authentication, analytics, location services, and backend integrations. Collaborated across the full development lifecycle from requirements gathering through development, testing, and production support.

• Developed and executed test plans for software applications(Web/Mobile) for commercial printers.
• Tested Fiery Server & Utilities products on the new generations of digital publishing print engines Ricoh, Canon, Xerox, and Konica Minolta.
• Conducted ad hoc, acceptance, smoke, functional, regression, localization, performance, load, and stress testing daily to validate application functionality.
• Performed testing on different web and mobile applications such as "EFI PrintMe Mobile" - Mobile printing for any Mobile OS devices (Windows Phone/Mobile, Android OS and iOS).