CRM Developer Needed to Fix Existing CRM Issues

I’m looking for an experienced CRM/PHP developer to review and fix issues in my existing CRM system. The system is already developed, but some features are not working correctly and need proper debugging, cleanup, and functional fixes. I need someone who can quickly understand the existing code, identify the root cause of the issues, and provide a clean and reliable solution. Please apply only if you have strong experience with CRM systems, PHP/MySQL, debugging, and existing codebases.