Johannesburg: iOS Developer posted by Crayon Technologies Ltd

Note: This role is for one of our clients. While we do track apply clicks, you’ll need to complete the quick steps on Crayon for your application to be considered. How you’ll role As a Senior iOS Developer, you’ll play a crucial role in designing and implementing high-quality mobile applications. This contract position involves leading the development of iOS applications using Swift, SwiftUI, and a variety of other Apple technologies. You will collaborate with cross-functional teams to define, design, and ship new features while ensuring optimal application performance and user experience. This is an opportunity to showcase your expert knowledge in iOS architecture, concurrency, and modern UI development. What you’ll do Develop high-quality iOS applications using Swift and SwiftUI Implement modern UI and animations using declarative UI patterns Ensure seamless integration of applications with legacy and hybrid systems using UIKit Utilize Combine for reactive programming and managing data streams Manage concurrency effectively with GCD, Operation Queues, and Structured Concurrency Optimize data persistence and application performance using Core Data Implement secure networking solutions with URLSession, REST APIs, and WebSockets Ensure app security with Keychain, biometric authentication, and secure storage techniques Handle push notifications via APNs and Firebase Cloud Messaging Apply architectural best practices such as MVVM, VIPER, and Clean Architecture Conduct thorough testing using XCTest for unit testing and UI Testing What you’ll need Strong proficiency in Swift, including understanding of async/await, property wrappers, and result builders Experience with SwiftUI for modern UI development and animations In-depth knowledge of UIKit for supporting legacy and hybrid apps Familiarity with Combine for reactive programming Understanding of concurrency management using GCD and Operation Queues Experience with Core Data for data persistence and performance optimization Knowledge of networking concepts including URLSession and WebSockets Experience in implementing security measures such as Keychain and biometric authentication Capability to handle push notifications using APNs and Firebase Experience with app architecture concepts like MVVM and Clean Architecture Proficiency in testing methodologies using XCTest and related tools