Jeroen Houtzager
's-Hertogenbosch, North Brabant, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJeroen Houtzager is a customer-focused IT professional with 15+ years of experience spanning lifecycle management, migrations and virtualization in Financial Markets, Payments and Finance value chains. After a decade as an IT Project Manager he now practices as a Solution Designer and IT Architect, favoring pragmatic, consistent designs and clear communication. He contributes to iOS open-source—improving libraries like SwiftDate and enhancing UI components in the archived Three20 project—demonstrating hands-on mobile and backend skills. Comfortable working internationally, he has delivered work across the UK, Belgium, Australia and Central Europe while remaining based in the Netherlands. Outside of core work he organizes tech talks and Meetups, volunteers for MS outings and sails, reflecting a collaborative mindset and steady curiosity in Swift, architecture patterns, Scrum and Cassandra.
15 years of coding experience
BSc, BSc at Gemeentelijke HTS Den HaagHAVO, HAVO at Huygenwaard
French, Dutch, English
Stackoverflow
123reputation
6kreached
6answers
0questions
Github Skills (14)
date-formatting10
objective-c10
swift10
ios10
date-format10
ui-design10
api-design9
datetime9
css6
cocoa-touch6
coredata6
testing6
ipad6
bdd6
Programming languages (7)
Github contributions (5)
malcommac/SwiftDate
Sep 2015 - Apr 2016
🐔 Toolkit to parse, validate, manipulate, compare and display dates, time & timezones in Swift.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:141 commits, 19 PRs, 83 pushes in 6 months
Contributions summary:Jeroen primarily focused on enhancing the functionality of the `SwiftDate` library, a toolkit for handling dates, times, and timezones in Swift. Their contributions included updating existing functions such as `add` and `set` to allow for optional parameters, improving usability. They also adapted internal calls to the updated functions, and addressed other minor improvements, refactoring and cleaning up code, and fixing bugs. They introduced convenience initializers and removed redundant functions.
date-timedate-formattingswiftdatestimezone
facebookarchive/three20
Mar 2011 - Sep 2011
Three20 is an Objective-C library for iPhone developers
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:10 commits in 6 months
Contributions summary:Jeroen primarily contributed to the UI and styling aspects of the Three20 library. They focused on enhancing the `TTSpeechBubbleShape` class by enabling and refining arrow positioning, alongside fixing related bugs and adding documentation. The user also addressed memory leaks and made minor corrections in other UI components like `TTMessageController` and `TTTableViewController`, and also updated the handling of logging within the CSS style component.
objective-ccocoapodsobjective-c-libraryiphonec-library
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