John Bijsterbosch
Freelance Mobile App Developer (.NET MAUI Xamarin) at John.Net Development
Gelderland, Netherlands
Summary
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Rockstar🎓
Top SchoolJohn Bijsterbosch is a freelance mobile app developer based in Gelderland, Netherlands, with eight years of professional experience building cross-platform apps using .NET MAUI and Xamarin. He combines a strong Sitecore/.NET background from agency and enterprise roles with hands-on mobile engineering, having contributed notable features and tests to the widely used Xamarin Community Toolkit. Comfortable across Android and iOS, he specializes in behaviours, UI enhancements and pragmatic testing to make common developer tasks easier and more robust. His career path spans lead and senior developer roles as well as long-term freelance practice, giving him both delivery discipline and adaptability for client work. Outside of software he serves as an aspirant volunteer firefighter, reflecting a practical, team-oriented mindset under pressure. Colleagues can expect a developer who pairs deep platform knowledge with an eye for reusable, well-tested components.
8 years of coding experience
8 years of employment as a software developer
Bachelor education at School, Information Sciences, Bachelor education at School, Information Sciences at Christelijke Hogeschool WindesheimHAVO, Science and Technology, HAVO, Science and Technology at Chr. College de Noordgouw
Dutch, English
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (8)
behavior10
xamarin-forms10
csharp10
dotnet-core10
android9
ios9
unit-testing8
xaml6
Programming languages (2)
Github contributions (5)
xamarin/XamarinCommunityToolkit
Sep 2020 - Feb 2021
The Xamarin Community Toolkit is a collection of Animations, Behaviors, Converters, and Effects for mobile development with Xamarin.Forms. It simplifies and demonstrates common developer tasks building iOS, Android, and UWP apps with Xamarin.Forms.
Role in this project:
Mobile Developer (Android/iOS)
Mobile Developer (Android/iOS)Contributions:12 reviews, 8 commits, 10 PRs in 5 months
Contributions summary:John contributed extensively to the Xamarin.Forms based cross-platform mobile application. Their work primarily involved implementing new behaviors and features, such as the UserStoppedTyping and MaxLengthReached behaviors. They also updated existing components, like the Shield view, with additional styling options and font customization. The user's changes frequently included modifications to the sample application and unit tests to validate the new functionalities, improving the functionality of the Xamarin.Forms Toolkit.
behaviorsxamarin-community-toolkituwpmaccatalystmobile-development
jBijsterboschNL/Xamarin.Forms
Nov 2019 - Oct 2023
Xamarin.Forms Official Home
Contributions:2 PRs, 3 pushes, 1 branch in 3 years 11 months
xamarin-androidxamarinxamarin-forms
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