Yuriy Holembyovskyy - Lead .NET Xamarin MAUI Developer at Serengeti

Yuriy Holembyovskyy

Lead .NET Xamarin MAUI Developer at Serengeti

Lviv, Lviv Oblast, Ukraine

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Summary

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Senior

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Top School

Yuriy Holembyovskyy is a Lead .NET Xamarin/MAUI Developer with 10 years of experience building cross-platform mobile and desktop apps using Xamarin.Forms, .NET MAUI and native Xamarin stacks. Based in Lviv, he has led full lifecycle projects integrating Azure backends and targeting iOS, Android, UWP, WPF, WinForms, Mac and Tizen, combining hands-on implementation with platform-specific rendering and lifecycle expertise. A strong mathematician by training (Master’s from Ivan Franko University), he brings analytical rigor to complex UI and memory-management issues. Yuriy is an active open-source contributor to flagship projects like Xamarin.Forms and .NET MAUI, where he implemented FontImageSource support for WPF, improved Picker alignment across platforms and fixed critical renderer disposal leaks. He’s known for shipping pragmatic fixes that improve cross-platform UI consistency and resource stability at scale.

10 years of coding experience

13 years of employment as a software developer

Master's degree, Mathematics, Master's degree, Mathematics at National University 'Ivan Franko' , Lviv

English, Ukrainian, Russian, Polish

Github Skills (16)

maui10

uwp10

net10

uid10

xamarin10

wpf10

xamarin-forms10

ios10

cross-platform10

csharp10

ui-design10

multiplatform10

front-end-development10

android10

net-maui10

Programming languages (1)

Github contributions (5)

dotnet/maui

Sep 2021 - Aug 2022

.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.

Role in this project:

Mobile Developer

Contributions:1 review, 3 commits, 2 PRs in 10 months

Contributions summary:Yuriy primarily focused on enhancing the .NET MAUI framework, addressing various platform-specific issues and implementing new features. Their contributions included adding support for FontImageSource in WPF, improving the iOS and UWP implementations of navigation bar features, and fixing bugs related to control rendering and disposal. The user demonstrated expertise in cross-platform UI development, specifically targeting iOS, Android, and UWP platforms. They also showed a strong understanding of platform-specific rendering and lifecycle management within the context of Xamarin.Forms.

app-platformmauimulti-platformiosmicrosoft

xamarin/Xamarin.Forms

Sep 2019 - Dec 2020

Xamarin.Forms Official Home

Role in this project:

Full-stack Developer

Contributions:2 reviews, 18 commits, 27 PRs in 1 year 2 months

Contributions summary:Yuriy contributed significantly to the Xamarin.Forms project, focusing on cross-platform UI enhancements and bug fixes. Their work included adding a `FontImageSourceHandler` for WPF to support custom fonts, implementing text alignment options for the Picker control across multiple platforms including iOS, Android, UWP, WPF, GTK, and Tizen. The user also addressed memory leaks and disposal issues in iOS and UWP renderers, along with other UI improvements and bug fixes.

user-interfacexamarincross-platformxamarin-formsmicrosoft

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