Add simple payment system to existing website ( Ruby on Rails )

I'm looking for for a good website developer who can add a payment system for existing web service for small business. please show your recent work before make any bid ------------------------------- This online system is used to connect the employee to the company. This platform is already deployed and used, this time I need to add another function - payment system for company. Companies will provide payment for the monthly subscription. Please use the Stripe API for creating payment system. You can read Stripe docs by clicking on this link: [login to view URL] The system framework is based on Ruby on Rails. We use Heroku as a deployment tool and Github as a cloud management system for the source code of this web service. please submit your Output by github merge request. There is no need to do web design. After you made function, web designers do that. - please make money plan page and cancel plan page ( we offer 3 monthly subscription plans based on needs. you don't need to design it) - the company has the option to cancel the subscription anytime provided the last subscription was paid. in this case, please proceed to the cancel plan page. - though this web service is for Japanese, structure is very easy to understand(database name, column, local variables are written in English) .