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Volodymyr Holub

@volodymyrholub

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I build C++/Qt mobile apps with native integrations and AI features.

Germany

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What I'm looking for

I'm looking for mobile app development or cross-platform engineering work where I can build native integrations, backend-connected features, AI-powered experiences, and reliable release and maintenance processes.

I've built cross-platform mobile products in Qt/QML and C++, most recently designing a fitness app for iOS and Android with AI-powered workout analysis.

For that product, I shaped requirements and MVP flows, integrated Symfony REST backends and OAuth, and delivered push notifications, subscriptions, health integrations, deep links, App Clips, Live Activities, and store-release preparation.

At GMG Color and CPCS, I developed high-performance C++/Qt applications for real-time data, video, hardware, and network communication, while contributing to architecture, performance optimization, code reviews, and long-term maintenance.

Experience

Work history, roles, and key accomplishments

Self-employed Software Developer

Self-employed

Oct 2024 - May 2025 (7 months)

Designed and developed a cross-platform fitness app for iOS and Android using Qt/QML, C++, and AI-powered workout analysis. Integrated Symfony-based REST backends, OAuth login, push notifications, in-app purchases, and AI features with OpenAI/Gemini and FAISS.

Qt Framework QML C++AI OpenAI Gemini Faiss REST APIs OAuth Push Notifications In App Purchases Healthcare Integration Universal Links App Clips IOS Live Activity Shortcut

C++/Qt Software Engineer

GMG Color

Jun 2022 - Sep 2024 (2 years 3 months)

Developed high-performance cross-platform applications using C++ and Qt, implementing modern UI/UX components and stable application logic. Optimized rendering, startup time, responsiveness, and resource usage, and integrated external SDKs and platform-specific functionality.

C++Qt Framework UI UX Performance Optimization SDK Integration Cross Platform Development

Senior C++/Qt & Full-Stack Engineer

CPCS

Jun 2013 - Feb 2022 (8 years 8 months)

Developed a C++/Qt application for mission planning, live telemetry, and command/control of a Pixhawk/ArduPilot-based system via MAVLink. Built high-performance UI flows with Qt Widgets/QML, real-time data, network communication, and defensive error handling.