Build a Desktop Application for Productivity Web Application

I've developed a web application which has a REST interface that the desktop client needs to interface with. The following are high level requirements for the project: - The Desktop application must work in Windows, Mac and Linux environments. - The application must be able to auto-update itself if an update is available. - The user primarily performs the actions on the website. The Desktop client will poll the website every 30 seconds for actions. The user's actions are primarily to start or stop a proxy server. - The application will have an internal proxy server, which it'll start or stop based on actions that the user specifies on the website. If the application "sees" that the user has decided to start the internal proxy server, the application will (1) start the internal proxy server and (2) set the system configuration to route requests to the proxy server. If the application "sees" that the user has decided to stop the proxy server, the application will (1) stop the internal proxy server, and (2) set the system configuration to route requests normally without going to the proxy server. - Desktop UI: The Desktop UI is very minimal, as the application can be accessed from the task bar, much like how Dropbox is. During launch and shutdown, the application will display a flashing image with a quote that is loaded from the web service. Finally the application will be providing desktop notifications to indicate the actions performed, like "Proxy Server Started" and "Proxy Server Stopped". - The application must include an uninstaller, but the uninstaller will not uninstall the software if the response from call to the web service states that is okay to uninstall. More implementation details will be provided if you are chosen to work on the project. What I need from you:     - An introduction from you basically highlighting who you are, and what your experience is in software development.     - What language you are planning to use to implement this.          - What method you're willing to use for setting/unsetting the system proxy server connection.