iOS development (Programming Languages/Technical Skills/Technologies): • Programming languages: Objective-C, Swift • Strong expertise in iOS Framework, OOP. • Architectural approaches: MVC, Singleton, Facade, Strategy, Category, Delegate, Adapter, Observer. • Protocols: Bluetooth Low Energy, NFC, TCP, UDP, HTTP, SMTP, Web socket • In-app billing and Subscription API • ThirdParty: Amazon AWS S3, GoogleMaps, QuickBlox, MagicalRecords, AFNetworking, PubNub, CocoaPods, Parse, CometChat, PortSIP, Twilio. • Firebase products: Firebase Cloud Messaging, Firebase Cloud Functions, Firebase Cloud Firestore, Firebase Cloud Storage, Firebase Dynamic Links, Firebase Crashlytics • Google Services and APIs: Google Cloud Messaging, Google Maps API • Social networks integration: Facebook, Twitter, Google Plus, Telegram, VK • BaaS: Parse • Continuous integration: Jenkins, bitrise.io • Version control: Git, SVN • Bug tracking systems and project management tools: fabric.io, Redmine, Asana, Trello, Jira