Gert-Jan Vercauteren focused on critical maintenance work in the Skyscanner/backpack-ios repository, addressing a security and build issue by removing the AppCenter SDK after a lost secret key made integration unfeasible. He updated the Podfile and adjusted build configurations to ensure the project remained stable and secure, reducing the risk of broken builds and simplifying future instrumentation. Working primarily with Objective-C and Swift in the Xcode environment, Gert-Jan leveraged his expertise in CocoaPods to streamline dependencies. While the work did not involve new feature development, it demonstrated careful attention to technical debt and proactive risk mitigation within the iOS codebase.