I have 5 years of software development experience and a diverse set of skills that appropriately enables me to design, develop, and manage mobile applications. I'm proficient in Objective-C, Swift, Java and Kotlin, with a deep knowledge of their ecosystems. In the development of mobile apps, I use various design and architectural patterns including VIPER, MVC, MVI, MVP, MVVM. Mobile development frameworks I can work with: AVKit, SiriKit, HealthKit, ARKit, SpriteKit, UIKit, Auto Layout, Keychain, XCTest, CocoaPods, Carthage, Core Location, ARCore, FFMPEG, libGDX, Google Assistant SDK, Google Fit, Android SDK, Android Architecture Components, JUnit, Mockito, Dagger, Xamarin, Flutter. My database knowledge involves: IDE: Xcode, Android Studio, AppCode, Android Studio, Xcode, Rider, Visual Studio. Moreover, I have good expertise in blockchain: Cryptography and Smart Contracts (Solidity). I've worked with the following blockchains: Bitcoin, Ethereum, VeChain and developed a number of multi-currency mobile wallets. In addition, I'm adept at the following app features and tools: I also provide a number of additional services including android integration with blockchain, developing new module functionality, revising code and optimizing application performance.