Jürgen Koller - SwiftUI Software Developer

Q: Where is Jürgen based?

Jürgen is based in Heilbronn, Germany .

Q: What languages does Jürgen speak?

Jürgen speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Jürgen have?

Jürgen has at least 15 years of experience. During this time, Jürgen has worked in at least 6 different roles . The average length of individual experience is 1 year and 11 months . Note that Jürgen may not have shared all experience and actually has more experience.

Q: What is Jürgen's latest experience?

Jürgen's most recent position is SwiftUI Software Developer .

Q: Which industries is Jürgen most experienced in?

Jürgen is most experienced in industries like Information Technology , Healthcare , and Sport . Jürgen also has some experience in Transportation and Government and Administration .

Q: Which business areas is Jürgen most experienced in?

Jürgen is most experienced in business areas like Information Technology , Product Development , and Logistics .

Q: Which industries has Jürgen worked in recently?

Jürgen has recently worked in industries like Information Technology .

Q: Which business areas has Jürgen worked in recently?

Jürgen has recently worked in business areas like Information Technology and Product Development .

Recommended expert

Heilbronn, Germany

Check rate

Experience

Jan 2023 - Present

3 years 6 months

SwiftUI Software Developer

Successfully implemented the complete macOS app 'PDF Content Search' and the iOS app 'PDF Cnt Search' from initial concept to final App Store release.

Jan 2022 - Dec 2022

1 year

Swift Software Developer

Developed a utility app for macOS using Xcode and SwiftUI
Used technologies: OCR, SQLite, cloud services, SwiftNIO
Published the 'PDF Content Search' app on the Apple macOS App Store

Jan 2021 - Dec 2022

2 years

Xamarin Frontend Developer

Member of a Scrum team building an app to access household appliances
Implemented user stories for cloud features via an external cloud service

Jan 2020 - Dec 2021

2 years

Xamarin Software Developer

Collaborated in a 9-member team (frontend, backend, QA, UI/UX) using agile Scrum
Implemented all pending user stories in a Xamarin Forms Shell application for iOS and Android

Jan 2019 - Dec 2020

2 years

Xamarin Software Developer

Sole developer responsible for the complete development and release process of a Xamarin app update with native UI for iOS and Android
Collaborated with UI designer and project manager

Jan 2018 - Dec 2019

2 years

Xamarin Software Developer

Developed a new mobile client for SAP systems using Xamarin.Forms (iOS, Android)
Supported a .NET team of 5 developers in creating a dynamic XAML user interface driven by Entity Framework

Jan 2018 - Dec 2018

1 year

Xamarin Software Developer

Migrated an Android app to Xamarin with a shared code base for Android and iOS
Applied MVVM, mobile services, data persistence, and Bluetooth communication
Took responsibility for the entire development cycle as lead developer

Jan 2017 - Dec 2017

1 year

Xamarin Frontend Developer

Introduced Xamarin expertise to a .NET team (frontend, backend, QA, UI/UX) following Agile Scrum
Business area: augmented reality remote service
Technologies: Xamarin, C#, Xamarin.Forms, Visual Studio, Visual Studio for Mac, iOS, Android, Windows UWP

Jan 2016 - Dec 2016

1 year

Xamarin Software Developer

Added new features and fixed bugs in an existing Xamarin Android app with native UI
Business area: sports and leisure
Technology: Xamarin C#, Xamarin Studio, Android

Jan 2016 - Dec 2016

1 year

Xamarin Software Developer

Developed a new Xamarin app from scratch with native UI for iOS and Android
Integrated backend and background services like GPS tracking
Business area: logistics and transport
Technology: Xamarin C#, Xamarin Studio, iOS, Android

Jan 2016 - Dec 2016

1 year

Xamarin Software Developer

Migrated a native Windows Phone app to Xamarin with support for iOS, Android, and Windows Phone
Planned and executed the app migration as the sole developer within the set time and budget
Industry: Logistics and Transportation
Technology: Xamarin C#, Xamarin Forms, Xamarin Studio, Visual Studio, iOS, Android, Windows Phone, SQLite, RESTful service

Jan 2015 - Dec 2015

1 year

Xamarin Software Developer

Connected an existing Xamarin Android app to a new backend REST API service
Industry: Sports and Leisure
Technology: Xamarin C#, Xamarin native UI, Xamarin Studio, Android, RESTful service, ServiceStack, MoPub

Jan 2015 - Dec 2015

1 year

Xamarin Software Developer

Developed a new Xamarin iOS/Android app to enable citizens to contact government officials
Industry: Citizen Services
Technology: Xamarin C#, Xamarin Forms, Xamarin Studio, Android, iOS, RESTful service, Azure push notifications

Jan 2014 - Dec 2014

1 year

Xamarin Software Developer

Developed a Xamarin iOS, Android, and Windows Store app for BORT Medical with 100% offline functionality for product updates
Client: BORT GmbH, Germany
Industry: Medical Healthcare
Technology: Xamarin C#, Xamarin native UI, Visual Studio, Xamarin Studio, SQLite, custom data synchronization, offline HTML layout rendering

Jan 2011 - Dec 2013

3 years

Mac Objective-C Developer

Developed a native macOS app in Objective-C for peer-to-peer data transfer without a cloud service
Industry: Tools and Utilities
Technology: Xcode, Objective-C, CocoaAsyncSocket

Jan 2011 - Dec 2013

3 years

Mac, iOS Objective-C Developer

Developed a native macOS app in Objective-C for photo professionals to easily distribute via smartphones
Developed the macOS server application MyPicServer and the MyPic client app
Business area: Utilities
Technology: Xcode, Objective-C

Jan 2011 - Dec 2012

2 years

Mac, iOS Objective-C Developer

Developed a new iOS app for BORT Medical with 100% offline functionality for product updates
Business area: Healthcare
Technology: Xcode, Objective-C

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Healthcare, Sport, Transportation, and Government and Administration.

Information Technology

Healthcare

Sport

Transportation

Government and Administration

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, and Logistics.

Information Technology

Product Development

Logistics

Summary

Xamarin / SwiftUI software developer with 13 years of experience in mobile application development and 10 years of experience building mobile apps with Xamarin technology.

Skills

Swift
Swiftui
.Net Maui (Xamarin)

Languages

German

Native

English

Advanced

Statistics

Experience

Total positions 17

Experience in Information Technology 12.5 y

Avg length 1 y 7 m

Longest experience 3 y 5 m

Expertise

Recent roles SwiftUI Software Developer, Swift Software Developer, Xamarin Frontend Developer

Main industries Information Technology, Healthcare, Sport

Main business areas Information Technology, Product Development, Logistics

Profile

Created

June 2025

Last Update

June 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Have questions? Find more information here.

Where is Jürgen based?

Jürgen is based in Heilbronn, Germany.

What languages does Jürgen speak?

Jürgen speaks the following languages: German (Native), English (Advanced).

How many years of experience does Jürgen have?

Jürgen has at least 15 years of experience. During this time, Jürgen has worked in at least 6 different roles. The average length of individual experience is 1 year and 11 months. Note that Jürgen may not have shared all experience and actually has more experience.

What roles would Jürgen be best suited for?

Based on recent experience, Jürgen would be well-suited for roles such as: SwiftUI Software Developer, Swift Software Developer, Xamarin Frontend Developer.

What is Jürgen's latest experience?

Jürgen's most recent position is SwiftUI Software Developer.

Which industries is Jürgen most experienced in?

Jürgen is most experienced in industries like Information Technology, Healthcare, and Sport. Jürgen also has some experience in Transportation and Government and Administration.

Which business areas is Jürgen most experienced in?

Jürgen is most experienced in business areas like Information Technology, Product Development, and Logistics.

Which industries has Jürgen worked in recently?

Jürgen has recently worked in industries like Information Technology.

Which business areas has Jürgen worked in recently?

Jürgen has recently worked in business areas like Information Technology and Product Development.

What is the availability of Jürgen?

Jürgen is immediately available part-time for suitable projects.

What is the rate of Jürgen?

Jürgen's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.