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Vlad Dev

@vladdev

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I build reliable, scalable Android platform systems used by millions.

United States

Message

At T-Mobile, I led development of the Diagnostics Android system app used on 20M+ devices, growing it from inception into a 100K+ LOC product with 20+ modules. I build scalable Kotlin-based platform architecture, improve crash and ANR reliability, and deliver reusable Android components.

I've modernized monolithic codebases through modularization, MVVM, Clean Architecture, and Dagger/Hilt; built secure REST integrations; and supported quality through observability, JUnit, and MockK. I also mentor Android developers, review code, and use AI-assisted engineering workflows with OpenAI APIs, Cursor, Claude Code, and GitHub Copilot.

Experience

Work history, roles, and key accomplishments

Senior Android Engineer

T-Mobile US, Inc.

Aug 2019 - Apr 2026 (6 years 8 months)

Led development of the T-Mobile Diagnostics Android system app used on 20M+ devices, growing the product from inception to a 100K+ LOC codebase and delivering 20+ modules. Applied MVVM and Clean Architecture principles with Dagger/Hilt, refactored a monolithic codebase into a modular architecture, and maintained low crash and ANR rates using Firebase Crashlytics and a custom analytics framework.