Jürgen Koller
SwiftUI Software Developer
Experience
Jan 2022 - Present
2 years 7 monthsSwiftUI-Software-Entwickler
- Complete implementation of the macOS app 'PDF Content Search' and the iOS app 'PDF Cnt Search' from initial concept through final App Store release
Jan 2021 - Dec 2022
1 yearSwift-Software-Entwickler
- Developed a utility app for macOS using Xcode and SwiftUI
- Technologies used: OCR, SQLite, cloud services, SwiftNIO
- Released the 'PDF Content Search' app on the Apple macOS App Store
Jan 2020 - Dec 2022
2 yearsXamarin Frontend-Entwickler
- Member of a Scrum team as a Xamarin frontend developer
- Implemented user stories for features provided via an external cloud service
- App enables access to household appliances
Jan 2020 - Dec 2021
2 yearsXamarin-Software-Entwickler
- Collaborated in a 9-member team (frontend, backend, QA, UI/UX)
- Agile Scrum approach for continuous implementation of user stories
- Developed a Xamarin Forms Shell application for iOS and Android
Jan 2019 - Dec 2020
2 yearsXamarin-Software-Entwickler
- Sole developer responsible for a Xamarin app update with native UI for iOS and Android
- Full development and release process
- Collaborated with UI designer and project manager
Jan 2018 - Dec 2020
2 yearsXamarin-Software-Entwickler
- Developed a new mobile client for SAP systems (Xamarin Forms iOS, Android)
- Supported a .NET team (5 developers) with Xamarin
- Created the XAML user interface with dynamically programmed elements driven by Entity Framework
Jan 2018 - Dec 2019
1 yearXamarin-Software-Entwickler
- Ported an Android app to Xamarin with a shared codebase for Android and iOS
- Applied the MVVM pattern
- Used mobile services, data persistence, and Bluetooth communication
- Lead developer responsible for the entire development cycle
Jan 2016 - Dec 2017
1 yearXamarin Frontend-Entwickler
- Worked with a .NET team (frontend, backend, QA, UI/UX) in Scrum
- Shared Xamarin expertise and achieved a successful project kick-off
Jan 2015 - Dec 2016
1 yearXamarin-Software-Entwickler
- Added new features and fixed bugs in an existing Xamarin Android app with native UI
Jan 2015 - Dec 2016
1 yearXamarin-Software-Entwickler
- Developed a new Xamarin app from scratch with native UI for iOS and Android
- Backend integration and background services such as GPS tracking
Jan 2015 - Dec 2016
1 yearXamarin-Software-Entwickler
- Ported a Windows Phone app to Xamarin (iOS, Android, Windows Phone)
- Planned and executed the port as a sole developer within time and budget constraints
Jan 2015 - Dec 2015
1 yearXamarin-Software-Entwickler
- Developed a new Xamarin iOS and Android app for contacting government officials
- Used Azure push notifications
Jan 2015 - Dec 2015
1 yearXamarin-Software-Entwickler
- Integrated an existing Xamarin Android app with a new backend REST API service
Jan 2014 - Dec 2015
1 yearXamarin-Software-Entwickler
- Developed a Xamarin iOS, Android, and Windows Store app for BORT medical with 100% offline functionality
- Technologies: Xamarin C#, native UI, SQLite, custom data synchronization, offline HTML layout rendering for product presentations
Jan 2010 - Dec 2014
3 yearsMac Objective-C-Entwickler
- Developed a native macOS app in Objective-C for peer-to-peer data transfer without cloud services
Jan 2010 - Dec 2014
3 yearsMac, iOS Objective-C-Entwickler
- Developed the macOS server application MyPicServer and the client app MyPic in Objective-C
- Distributed photos to smartphones for professional photographers
- Available on the App Store
Jan 2010 - Dec 2013
2 yearsMac, iOS Objective-C-Entwickler
- Developed a new iOS app for BORT medical with 100% offline functionality to deliver product news
Languages
German
Native
English
Advanced
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