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 (25)

C#CGoHTMLJupyter NotebookTypeScriptShellBicep

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.

microsoft/dotnet-podcasts

Nov 2021 - Dec 2022

.NET reference application shown at .NET Conf featuring ASP.NET Core, Blazor, .NET MAUI, Microservices, Orleans, Playwright, and more!

Role in this project:

Mobile Developer (Android)

Contributions:51 reviews, 202 commits, 130 PRs in 1 year

Contributions summary:James primarily focused on the Android mobile application within the .NET Podcasts project. They made substantial changes within the `MediaPlayerService.cs` file, indicating work on audio playback functionality, media session management, and notification integration. Further commits involved adjustments to the Android build configuration, including changes to the `csproj` files and the Android manifest, demonstrating a focus on the Android platform specifically. The user updated the Android service and receivers to address API 31 compatibility, which impacted app functionality and stability.

blazordotnetmauimicroservicesplaywright

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