WHMCS Hooks Development

I need an experienced WHMCS developer to create complex hooks for my WHMCS setup. The goal is to automate various processes and integrate with multiple third-party services.

Key Requirements:
- Complete my already working WHMCS hook
- Automate billing and other processes
- Integrate with third-party services

Ideal Skills & Experience:
- In-depth knowledge of WHMCS
- Strong coding skills, particularly in PHP
- Experience with API integrations
- Familiarity with billing systems and automation

Please share your relevant experience and approach.