Square Payment Gateway Integration on WordPress

I'm looking for a skilled developer to integrate Square as a payment gateway on my WordPress site. The integration will only be for one-time payments.

Key Requirements:
- Experience with WordPress
- Expertise in integrating Square payment gateway
- Ability to ensure secure and smooth transaction processing

Ideal Skills and Experience:
- Proficiency in WordPress plugins and payment systems
- Strong understanding of e-commerce and payment security
- Previous experience with similar projects

Please provide examples of your work and an estimated timeline for completion.