We need a web developer to program a Paypal automatic payment form which approves payments limits, then charge once each month a correct amount based on services delivered on our client's website. Basically here is how it will go:
1. User chooses a service plan, Agrees to a limit amount we can charge him
2. Depending on services completed, for example if 60% of service is completed, he will be charged 60%. The charge should be done automatically on Paypal using cron job script run every first of the month
3. If user cancels Paypal automatic payment profile in the middle of the month for example, he should be charged at the time of the cancellation for the delivered service.
More details will be provided upon winning the project.
Please provide example Paypal integration for reference.