Dan Z
Lead IOS Developer And Mobile Software Engineer at Freelance
Los Angeles, California, United States
Summary
👤
Senior🎓
Top SchoolDan Z is a Lead iOS Developer and mobile software engineer with over 20 years of Apple platform experience and 14 years of focused professional practice delivering high-performance mobile experiences. He has led teams that built and modernized large-scale apps used by millions—most notably Ticketmaster, Live Nation, and Fox Sports—while dramatically cutting technical debt and improving stability and performance. Dan combines deep systems and backend knowledge (CDNs, HTTP/2/SPDY, search, analytics) with hands-on expertise in Core Audio, AVFoundation, Bluetooth LE, and security hardening such as SSL pinning and OWASP practices. A proven leader and mentor, he transitioned teams from waterfall to agile and drove rapid Lean UX experiments and A/B testing to accelerate product-market fit. Active in open source and notable for QA/test contributions to the widely used AFNetworking project, he ranks among the top communicators on StackOverflow and brings pragmatic engineering paired with strong cross-platform and performance-first instincts.
14 years of coding experience
18 years of employment as a software developer
Aerospace, Aeronautical and Astronautical Engineering, Aerospace, Aeronautical and Astronautical Engineering at University of Maryland Eastern Shore
English
Stackoverflow
21,183reputation
1.8mreached
368answers
0questions
apple-push-notifications
top-5%
grand-central-dispatch
top-5%
security
top-5%
concurrency
top-5%
cocoa
top-5%
encryption
top-5%
Github Skills (23)
objective-c10
ios10
testing10
xctest10
coredata10
push-notifications9
security9
cocoa9
multithreading9
apple-push-notifications9
grand-central-dispatch9
iphone9
nsurlsession9
delegates9
xcode9
Programming languages (7)
Github contributions (5)
AFNetworking/AFNetworking
Mar 2016 - Mar 2016
A delightful networking framework for iOS, macOS, watchOS, and tvOS.
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:8 commits, 3 PRs, 3 comments in 1 day
Contributions summary:Dan primarily contributed to the testing infrastructure of the project. They added new test classes and methods specifically targeting the `AFImageResponseSerializer` class. Their work included writing tests for copying, archiving, secure coding, and properties related to image scaling and inflation, ensuring the serializer's functionality and data integrity. Additionally, the user updated existing tests to improve clarity and maintainability.
tvosnetworkingswiftiosmac-catalyst
quellish/LinkedInForMobileDevelopers
Dec 2017 - Jul 2018
Contributions:90 commits, 61 pushes, 3 branches in 7 months
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