convert php software to wordpress

I'm looking for an experienced wordpress coder. I have an existing autoresponder software written in php. I want to convert it to an encrypted wordpress plugin. Basically a user subscribes to the autoresponder and that user is added to the subscriber list. The autoresponder sends messages to the user at preset intervals. Instead of a standalone application, I just want it to be a wordpress plugin. Please do not bid if you are not experienced with creating wordpress plugins or encrypting wordpress plugins with ioncube or other encryption.