PayPal Recurring Payments Integration

I need a skilled developer to integrate PayPal for payments processing within Cyclos. The integration should specifically support recurring payments. The intervals for these payments will be user-defined.

Essential Requirements:
- Integrate PayPal for recurring payments within Cyclos
- Enable user-defined payment intervals

Ideal Skills and Experience:
- Experience with PayPal API
- Familiarity with Cyclos platform
- Strong background in payment processing integrations
- Ability to create user-defined payment options

Please provide examples of similar work done.