We already have a team of developers and an established application that's hosted in AWS.
We need to enhance our application to charge credit/debit card of our clients each month as well as on-demand. The rest of the application is developed using Java/Spring/Hibernate/MySQL/REST.
The new module to be added will integrate with Authorize.Net payment gateway to carry out transactions against pre-stored charge cards. It will also enable our user interface to store/update charge card information. Lastly, it will also expose REST API's to run on-demand credit/debit transactions.
Upon completion of this project, there may be other on-going work.