- Integrate third party libraries, for example: -- Visualise any data in charts -- UI-kits -- Localization -- Animation -- Manipulation with any parts of UI (like swipe to delete etc.) - Create custom UI-kits: -- Modal windows -- Side menu -- List items -- Buttons -- Inputs -- Sliders -- Charts -- etc. - Create scalable architecture of apps - Push notifications - Siri integration for iOS - Deploy test builds to firebase test flight service with the ability to install on a smartphone - Create online stores - Integrate payment services Besides mobile development: - ReactJS - VueJS - NuxtJS - HTML (pure and preprocessors) - CSS (pure and preprocessors) - Create scalable architecture of web apps - Web sockets - Integrate any third party services - Setting up the development environment - Code optimisation - Optimisation of asynchronous code using custom event cache - Create chats with the ability to send text and files - Create API clients - Writing technical documentation