Janus Weil
Software Engineer Tower Systems at DFS Deutsche Flugsicherung GmbH
Frankfurt, Hesse, Germany
Summary
🤩
Rockstar🎓
Top SchoolJanus Weil is a software engineer based in Frankfurt with 18 years of experience building robust, cross-platform mobile and mapping solutions, currently working on tower systems at DFS Deutsche Flugsicherung. He blends a strong physics research background (Dr. rer. nat.) with hands-on engineering, contributing iOS-specific fixes and feature work to high-profile .NET MAUI and Bluetooth LE projects and adding UX-driven enhancements to the Mapsui mapping library. Janus is comfortable across the stack—platform-specific mobile APIs, sensor fusion (orientation/quaternions), and UI/interaction design—and has a track record of modernizing dependencies and ensuring multi-platform compatibility. His career spans research science to industrial software, reflecting an ability to translate complex technical problems into reliable, production-ready features for safety-critical environments.
18 years of coding experience
6 years of employment as a software developer
visiting graduate student Physics, visiting graduate student Physics at University of WashingtonPhysics, Physics at CERN Summer SchoolDr. rer. nat. Physics, Dr. rer. nat. Physics at Justus Liebig University GiessenPhysics, Physics at JLab Summer School
German, English, Spanish
Stackoverflow
21reputation
15kreached
1answer
0questions
Github Skills (32)
ios10
xamarin-android10
maui10
net10
skiasharp10
xamarin10
bluetooth-le10
ui-design10
net-maui10
mvvmcross10
uid10
geo10
xamarin-forms10
btle10
front-end-development10
Programming languages (9)
Github contributions (5)
dotnet-bluetooth-le/dotnet-bluetooth-le
Mar 2021 - Jan 2023
Bluetooth LE plugin for Xamarin/MAUI, supporting Android, iOS, Mac, Windows
Role in this project:
Mobile Developer (Android/iOS)
Mobile Developer (Android/iOS)Contributions:16 releases, 136 reviews, 150 commits in 1 year 10 months
Contributions summary:Janus primarily contributed to the Bluetooth LE plugin, focusing on cross-platform mobile development. Their work included enabling Bluetooth 5 advertising extensions for Android devices, updating the project's dependencies such as Xamarin.Forms and MvvmCross, and adapting code for newer Android versions. They also made significant changes to support updated Xamarin.Essentials and handle Bluetooth permissions effectively for Android 12.
androidbluetooth-leiosmauiwindows
Mapsui/Mapsui
Oct 2020 - Nov 2022
Mapsui is a .NET Map component for: MAUI, Avalonia, Uno Platform, Blazor, WPF, WinUI, Windows Forms, Eto Forms, .NET for Android and .NET for iOS
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:70 reviews, 133 commits, 93 PRs in 2 years
Contributions summary:Janus primarily contributed to the UI and user interaction elements of the Mapsui project. They added a new property 'RotateWithMap' to the Pin class in the Xamarin.Forms UI, enabling symbols to rotate with the map. They implemented and tested callout features within the UI, addressing layout and button positioning on different platforms. They also updated project dependencies to newer versions of Xamarin.Forms, SkiaSharp, and Svg.Skia, and made code adjustments for these upgrades.
androidavaloniablazordotnetios
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