Xcode, Core Data, Agile Development Methodologies, Objective-c, Push Notifications, Ios Development, Uikit, Core Animation, Restful Apis, Swift, UI UX design principles, cloud message APIs

Testing, MVC Framework, Zend Framework, React Native, Communication Skills, chatbots

app store , socket.io , Redux, Node.js, Typescript, Javascript, Permissions, React Native, Webrtc, mobx, Android Connection Service, React hooks, VoIP, Play Store, Janus, mobile app lifecycle, SIP, background services, iOS CallKit