Germán Marquez
Sr IOS Engineer at Freelance iOS Developers
Argentina
Summary
👤
Senior🎓
Top SchoolGermán Marquez is a senior iOS engineer with 9 years of experience building scalable, high-performance mobile applications across fintech, media, gaming, and event ticketing. He combines deep expertise in Swift and Objective-C with solid architecture skills (MVVM, Clean Architecture) and a track record of leading migrations from legacy UIKit/Objective-C to SwiftUI. At OV Loop he architected a virtual wallet and IoT contactless payment integrations, and later drove modernization and AI-agent experimentation for a ticketing app. As a freelancer he focuses on modular, maintainable systems and handles the full release pipeline, including App Store Connect, code signing, and provisioning. He contributes to Xamarin.iOS sample apps and has hands-on experience fixing crashes and updating platform-specific compatibility, reflecting attention to reliability at the component level. Based in Argentina, he is pioneering “AI-first” workflows and vibe-coding to accelerate prototyping without sacrificing code quality.
9 years of coding experience
14 years of employment as a software developer
En curso, Ingeniería en Sistemas de Información, En curso, Ingeniería en Sistemas de Información at Universidad Tecnológica Nacional
Spanish, English
Github Skills (5)
swift10
ios10
xamarin-ios10
uikit9
objective-c8
Programming languages (2)
Github contributions (4)
xamarin/ios-samples
Sep 2016 - Jan 2017
Xamarin.iOS sample apps
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:16 commits, 8 PRs, 7 comments in 3 months
Contributions summary:Germán primarily worked on Xamarin.iOS sample applications, focusing on iOS 10 compatibility and updates. Contributions include modifying the QuickContacts sample to leverage new iOS 10 features and fixing crashes in the bracket view component. Further improvements included code refactoring and merging updates from the master branch into the iOS 10 branch.
ios-samplesample-appstvosxamarin-ioswatchkit
gdmarquez90/ios-samples
Sep 2016 - Jan 2017
Contributions:21 pushes, 11 branches in 3 months
ios-samplesample-appsxamarin-iosxamarinios
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