Available to hire
I am a product-driven Senior iOS Developer with 13 years of experience and three self-published apps. I approach problems with critical, first-principles thinking and a product-centric mindset. I am a self-motivated, versatile developer with strong communication and mediation skills in German and English.
I value collaboration with cross-functional teams, am comfortable navigating complex environments, and enjoy turning ideas into robust, scalable software solutions. I thrive on delivering value through clean architecture, shared tooling, and a focus on user experience.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Language
German
Fluent
English
Fluent
Work Experience
Senior iOS Developer (Contractor) at SRF
January 1, 2022 - PresentPersonally rewrote the state-funded weather app SRF Meteo, which currently has over 1 million users. Architected and developed shared Swift packages to streamline code and unify features across the SRF app portfolio (Meteo, News, Sport).
Contractor at ZKB
January 1, 2021 - PresentContributed to the SwiftUI and Kotlin Multiplatform rewrite of the core banking app, successfully navigating a complex, legacy-heavy IT environment.
Senior iOS Developer at IOKI (by Deutsche Bahn)
January 1, 2020 - October 9, 2025Developed a whitelabeled, on-demand ride-sharing app from scratch in a two-person iOS team. Engineered integrations with local public transport provider APIs to create a multi-modal transit solution.
iOS Developer at FAVENDO
January 1, 2017 - October 9, 2025SDK for indoor user positioning via Bluetooth beacon RSSI triangulation. Proprietary point-to-point navigation engine. Highly customizable whitelabel app supporting custom, multi-level floor plans on Google Maps.
Research Assistant at University of Bayreuth
January 1, 2014 - October 9, 2025Research on deliberative democratic theory (Habermas) funded by Deutsche Forschungsgemeinschaft.
Contractor - iOS Developer at SRF
January 1, 2022 - PresentRewrote the state-funded SRF Meteo app and architected shared Swift packages to streamline code and unify features across SRF's Meteo, News, and Sport apps; the Meteo app currently serves over 1 million users.
Contractor - iOS / SwiftUI & Kotlin Multiplatform at ZKB
January 1, 2021 - October 9, 2025Contributed to the SwiftUI and Kotlin Multiplatform rewrite of the core banking app, navigating a complex, legacy-heavy IT environment.
Senior iOS Developer at IOKI (by Deutsche Bahn)
January 1, 2020 - October 9, 2025Developed a whitelabeled, on-demand ride-sharing app from scratch in a two-person iOS team; integrated with local public transport provider APIs to create a multi-modal transit solution.
iOS Developer at FAVENDO
January 1, 2017 - October 9, 2025SDK for indoor user positioning via Bluetooth beacon RSSI triangulation; proprietary point-to-point navigation engine; highly customizable whitelabel app supporting multi-level floor plans on Google Maps.
Research Assistant at University of Bayreuth
January 1, 2014 - October 9, 2025Research on deliberative democratic theory (Habermas) funded by Deutsche Forschungsgemeinschaft.
Contractor - iOS & Kotlin Multiplatform at ZKB
January 1, 2021 - PresentContributed to the SwiftUI and Kotlin Multiplatform rewrite of the core banking app, successfully navigating a complex, legacy-heavy IT environment
Senior iOS Developer at IOKI (by Deutsche Bahn)
January 1, 2017 - December 31, 2020Developed a whitelabeled, on-demand ride-sharing app from scratch in a two-person iOS team; Engineered integrations with local public transport provider APIs to create a multi-modal transit solution
iOS Developer at FAVENDO
January 1, 2014 - December 31, 2017SDK for indoor user positioning via Bluetooth beacon RSSI triangulation; Proprietary point-to-point navigation engine; Highly customizable whitelabel app supporting custom, multi-level floor plans on Google Maps
Research Assistant at University of Bayreuth
January 1, 2012 - January 1, 2014Research on deliberative democratic theory (Habermas) funded by Deutsche Forschungsgemeinschaft
Contractor at SRF
January 1, 2022 - PresentRewrote the state-funded weather app SRF Meteo; currently used by over 1 million users. Architected and developed shared Swift packages to streamline code and unify features across the SRF app portfolio (Meteo, News, Sport).
Education
Master in Philosophy at University of Bamberg
January 1, 2009 - January 1, 2011Study Abroad Program at University of Mount Union
January 1, 2009 - January 1, 2010Bachelor of Arts in Political Science at University of Bamberg
January 1, 2005 - January 1, 2008Religious & Community Studies at CIS Pinetown, South Africa
January 1, 2003 - January 1, 2004Master in Philosophy at University of Bamberg
January 1, 2009 - January 1, 2011Study Abroad Program at University of Mount Union
January 1, 2009 - January 1, 2010Bachelor of Arts in Political Science at University of Bamberg
January 1, 2005 - January 1, 2008Religious & Community Studies at CIS PINETOWN, South Africa
January 1, 2003 - January 1, 2004Master in Philosophy at University of Bamberg
January 1, 2009 - January 1, 2011Bachelor of Arts in Political Science at University of Bamberg
January 1, 2005 - January 1, 2008Study Abroad Program at University of Mount Union
January 1, 2009 - January 1, 2010Religious & Community Studies at CIS PINETOWN
January 1, 2003 - January 1, 2004Master in Philosophy at University of Bamberg
January 1, 2009 - January 1, 2011Study Abroad Program at University of Mount Union
January 1, 2009 - January 1, 2010Bachelor of Arts in Political Science at University of Bamberg
January 1, 2005 - January 1, 2008Religious & Community Studies at CIS PINETOWN, South Africa
January 1, 2003 - January 1, 2004Qualifications
Industry Experience
Media & Entertainment, Financial Services, Transportation & Logistics, Retail, Software & Internet, Professional Services
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Hire a App Developer
We have the best app developer experts on Twine. Hire a app developer today.