Custom WHMCS Payment Module Development

I'm seeking a developer to create a custom payment module for WHMCS using Dodo Payments. The API is available for integration.

Requirements:
- Support for one-time payments only
- Integration should not disrupt existing WHMCS functionality; minimal popup integration is preferred

Ideal Skills & Experience:
- Proficiency in WHMCS and payment gateway integrations
- Strong knowledge of Dodo Payments API
- Experience with secure payment processing and module development

Please provide examples of similar work done.