Develop a simple gMail plugin

Dear Developer, This is an opportunity to work on something that could, make you very wealthy.. It should be fairly simple to build. But definitely not easy.. The app: [login to view URL] Was loved by me, many of my colleagues and so many business development people that I know... I already have the market for us to do well out of it.. I am looking for a developer that will be paid for their work, but the biggest payout will be as a partner in the business surrounding the app.. Please have a good look at: [login to view URL] and you will know exactly what I want to built... Then give me an idea of time frame, estimated costing's, requirements, etc.. I think this would be done with Python and possibly Ruby as well but if you have better ideas I am all ears. My side of the partnership is the marketing and the sales and the agency. I have been in sales and marketing for 15 years, I have a digital agency: [login to view URL] and I have been running agencies for the best part of more than a decade. Thanks, Josh