AppForce1 Worklog: Refactoring an 8-Year-Old iOS App is Like Restoring a Classic Car

Send me a text Jeroen shares his real-world iOS development journey working on a legacy app at Dawn Technologies. He details his systematic approach to modernizing an 8-year-old codebase that serves as a critical tool for companies. • Breaking down a monolithic App Delegate into dedicated managers with single responsibilities • Leveraging the existing feature flag system to safely deploy new implementations • Refactoring the walkie-talkie functionality with real-time audio streaming over WebSockets • Completely rewriting the chat system to use a modern service-based architecture • Overhauling the location tracking system to use iOS 17's new async location tracking APIs • Implementing WiFi settings fixes for iOS 16 compatibility using modern APIs • Maintaining a cleanup branch to remove deprecated APIs and fix compiler warnings Check out Do iOS , the iOS development conference I'm organizing later this year. Visit do-ios.com for more information and tickets - link in the show notes. Join me in Amsterdam for Do iOS 2025 , tickets and details available now. Lead Software Developer Learn best practices for being a great lead software developer. Lead Software Developer Learn best practices for being a great lead software developer. Disclaimer: This post contains affiliate links. If you make a purchase, I may receive a commission at no extra cost to you. Support the show Do iOS: Rate me on Apple Podcasts. Send feedback on SpeakPipe Or contact me: Mastodon: X: BlueSky: LinkedIN: Support my podcast with a monthly subscription, it really helps. My book: Being a Lead Software Developer

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AppForce1 Worklog: Refactoring an 8-Year-Old iOS App is Like Restoring a Classic Car is an episode from AppForce1: news and info for iOS app developers by Jeroen Leenarts.

This episode is 22:46 long.

This episode was published on Sep 29, 2025.

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