Write some Software

We need a client application written in python, with some simple GUI interface. The Application will move large files (up to 4Gb) to a remote FTP server. The application should support Windows, Linux, Max, and install as an auto starting application on a Windows PC. The application needs to support digital signing of files as well, using gnupg. Full requirements attach. Please confirm you have read the requirement, and your quote includes complete delivery to the requirement. You should include test evidence in your estimations. Please confirm when you can start, and how long you expect this activity to take. Milestone 1 : Fully functional/complete application. 75% Milestone 2 : Concluded Snags and outstanding functionality 25% Thank you