WordPress Payment Integration & Setup

I need a skilled developer to set up essential functionalities on my WordPress website. The tasks include:

- Login/Logout functionality
- Payment checkout setup using Stripe (Credit/Debit Card)
- Integrate a digital signature service (to be decided)
- Email contract upon signature completion

Ideal Skills and Experience:
- Proficiency in WordPress development
- Experience with Stripe payment gateway integration
- Familiarity with digital signature services like DocuSign, Adobe Sign, or HelloSign
- Strong knowledge of email automation and contract management

Please provide examples of similar work done.