Entwickler (m/w) iOS

9/2015 – 11/2015

Programmed mobile iOS apps “TVGuide” and “Kinofinder” for Apple's App Store. Worked remotely from home office within an agile environment. Implemented extensive UI features including custom embedded CollectionViews. Developed apps with unique API specifications requiring REST and JSON protocols. Performed routine testing on target devices and OS versions (iPad and iPhone, iOS4 – iOS9, Swift 2). Provided daily commits through GitHub.

Mac OS, iOS, Objective-C, Git, Swift (Apple), Representational State Transfer (REST), JavaScript Object Notation (JSON)

10/2011 – 8/2016

Develop and maintain the Zoiper VoIP App for iOS. Developed mobile iOS apps “Zoiper” and “Elcom” for Apple's App Store. Worked within agile scrum team with cross project collaboration. Implemented UI, cross-platform wrapper, Reachability, Networking, Notifications, Audio, Telephony, and Video Calling features; custom video streaming for VoIP softphone integration. Performed bug fixes, testing, added new features and maintained code repository. Provided daily and release SW builds and ad hoc versions
for testing. Distribution on the App Store, provisioning and code signing.

Hardware Entwicklung, iOS, Mobile Entwicklung (allg.), iOS Entwicklung, VoIP, User Experience (UX), User Interface (UI)

3/2011 – 9/2011

Ported existing Buildings App and completely restructured and rebuilt. Reviewed company's existing version of the mobile iOS app “OpenBuildings” and rewrote it entirely from the ground up. Application is used to explore crowd-sourced database of architecture projects and built environments. Performed development within an agile BDD framework with Pivotal Tracker. Programming HTTP, Location Services, Custom UI, Facebook Connect, Twitter, and on-the-fly graphics rendering. In charge of preparing the app for distribution on App Store.

Mac OS, iOS, Objective-C, Apache Subversion (SVN)