Typically we would just use a plugin to complete this development, however, most plugins do not offer an option to save customer information as a profile in the Authorize.net CIM tool UNLESS the customer chooses to do so.
We need the customer information from all successful credit card transactions to be automatically saved to the Authorize.net CIM tool - WITHOUT any action from the customer/user. (Customer will not need to check the "Save my card details for later" box)
Authorize.net lists specific details as to how to accomplish as a developer.
If you can accomplish this SEAMLESSLY then please apply. If you have any questions please message me.