As an iOS Contractor, you should have strong proficiency in Swift and Objective-C, experience with iOS frameworks, and a solid understanding of the full mobile development lifecycle. Familiarity with Xcode, Git, and Apple's Human Interface Guidelines is crucial, and industry certifications like Apple Certified iOS Developer can be advantageous. Excellent communication, time management, and problem-solving skills set top candidates apart, especially when working remotely or with cross-functional teams. These skills ensure high-quality, efficient app development and seamless collaboration for successful project delivery.