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Jürgen Koller
SwiftUI Software Developer
Heilbronn, Germany
Experience
Jan 2022 -
Present
2 years 7 months
SwiftUI-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 year
Swift-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 years
Xamarin 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 years
Xamarin-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 years
Xamarin-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 years
Xamarin-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 year
Xamarin-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 year
Xamarin 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 year
Xamarin-Software-Entwickler
Added new features and fixed bugs in an existing Xamarin Android app with native UI
Jan 2015 -
Dec 2016
1 year
Xamarin-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 year
Xamarin-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 year
Xamarin-Software-Entwickler
Developed a new Xamarin iOS and Android app for contacting government officials
Used Azure push notifications
Jan 2015 -
Dec 2015
1 year
Xamarin-Software-Entwickler
Integrated an existing Xamarin Android app with a new backend REST API service
Jan 2014 -
Dec 2015
1 year
Xamarin-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 years
Mac 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 years
Mac, 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 years
Mac, iOS Objective-C-Entwickler
Developed a new iOS app for BORT medical with 100% offline functionality to deliver product news
Languages
German
Native
English
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