Re-opened: WordPress plugin for PayPal & credit card processing. - repost

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
We re-open this Project, earlier bidders need NOT to apply:
We escrow agreed amount with milestones but NO ADVANCE PAYMENT

Need a verifiable WordPress expert to write a content monetization and payment plug-in for a WP CMS platform:

Plugin must provide easy integration with our payment system. API will be given after successful agreement.
Plugin must have its own settings in the CMS admin panel, user-filled information, security keys etc.
Post enabled for payments must be separate for (free) preview and the rest of content (paid), so that before payment, user see only preview and PAY button.
In post editor, there must be additional tag with an icon to upload and payment break line, which separates preview from the rest of the post that is paid.

Plug-in must store information about users' actions and purchases.

In addition, the CMS admin will set up Subscriptions, Timed Access (micropayments) and Donations to all posts/individual content in various formats (text/pdf; video, audio, pictures, apps, etc) .

Plugin must enable:
- multiple metered access (for example: 10 times to 10 different posts)
- timed access (for example: weekly or monthly to all posts or section of the site)
- recurring access (multiple viewing of the already paid-for content)

Skills required:
CMS, eCommerce, Paypal API, Wordpress
About the employer:
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