James Montemagno

United States

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Summary

🤩

Rockstar

James Montemagno is a seasoned mobile software engineer with 14 years of experience specializing in Xamarin and .NET MAUI, known for shipping cross-platform native APIs, plugins, and sample apps used widely across the .NET mobile ecosystem. As Developer Community Lead at Microsoft, he blends hands-on Android/iOS development with community-facing work—contributing to high-profile projects like Xamarin.Essentials, Xamarin Community Toolkit, and the .NET MAUI repositories. His open-source footprint includes widely used plugins (MediaPlugin, GeolocatorPlugin, InAppBillingPlugin) and tooling (MonkeyCache), where he’s driven UI polish, platform-specific integrations, and build/release automation. Based in the United States with a BS in Software Engineering, he pairs deep practical expertise in mobile platform quirks with a knack for developer experience and workshop-ready training material. An avid cyclist who prefers Twitter/GitHub over LinkedIn, he often surfaces subtle UX and platform compatibility fixes that keep mobile apps robust across OS updates.

14 years of coding experience

Stackoverflow

Stats

3,792reputation

376kreached

44answers

0questions

Badges

android

top-5%

visual-studio

top-5%

xamarin

top-1%

Github Skills (78)

nuget10

mobile-development10

image-processing10

windows-phone10

xamarin-ios10

android-developer10

asp-net10

javas10

media-player10

build-automation10

bluetooth10

web-development10

rss10

javascript10

maui10

Programming languages (18)

C#PowerShellCSSC++G-codeVueHTMLJupyter Notebook

Github contributions (5)

xamarin/dev-days-labs

May 2015 - Sep 2017

Role in this project:

Mobile Developer (Android/iOS)

Contributions:78 commits, 21 PRs, 74 pushes in 2 years 4 months

Contributions summary:James primarily updated and added code to the `MainPage.xaml.cs` file, which indicates modifications to the user interface of the Android and iOS applications. Further evidence shows the user integrated Couchbase Mobile, which suggests work in backend database and mobile application development. Additionally, the user updated a TripExpense demo to incorporate new features, demonstrating work on cross-platform application functionality.

xamarin/Essentials

Jul 2019 - Nov 2022

Xamarin.Essentials is no longer supported. Migrate your apps to .NET MAUI, which includes Maui.Essentials.

Role in this project:

Mobile Developer (Android)

Contributions:50 reviews, 42 commits, 481 PRs in 3 years 5 months

Contributions summary:James primarily contributed to the Xamarin.Essentials repository, focusing on Android-specific implementations and fixes. They implemented new network callbacks for Android, addressing connectivity changes. They also fixed bugs related to device display information, phone dialing, and app actions, enhancing the library's functionality and stability on Android. Several commits bump AndroidX dependencies and removed launch flags.

dotnetuwpreact-nativeandroidessential

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