Languages: Swift/Objective-C

Architectures: MVC, MVP, VIPER

iOS SDK: Foundation, UIKit, Autolayout, Keychain, Local Authentication

Distribution: TestFlight, Betafamily, Diawi, Crashlytics

Third party libraries: GoogleMaps, Lottie, Alamofire/AFNetworking, Stripe, Fabric, Analytics, Social Networks(Facebook, VK, Twitter, Google), etc.

And many others: Push Notifications, Deep links, MessagesKit, Git, Fastlane, Jenkins, Server Side Swift, Dependency Injection, Jira, etc.