Flutter Designer and programmer

I'm looking for an individual, not a team, to work on my project to create a web-based application; he must have experience in flutter and excel vba, and be able to work by the hour and quickly; developing a single page, no matter how complex, should not take more than three to five hours.

Please indicate in your proposal approximately how many hours it will take you to design a very complex page and whether or not you can talk in English.


Thank you very much