Redesigning the google chrome plugin

I am looking for a person who will rework a plugin for google chrome that supports mainly webapp.

I need a person who will redesign it for my requirements.

- Probably will need to put something like a server through which the user will be able to log into the plugin so that he can use it.

- There will be an option to generate a password for the user for a certain period of time, so that after that time the user will lose access to it

- Indicated knowledge of Webapp in order to easily understand the solution to the problem