Fix PHP Plugin Caching Bugs

I'm looking for an experienced WordPress developer to troubleshoot and fix caching-related bugs in a PHP plugin. After 24-48 hours, the plugin starts to malfunction, particularly with API requests. It seems to be related to session caching issues, possibly with FlyingPress.

Key Requirements:
- Expertise in PHP and WordPress plugin development
- Experience with caching mechanisms, especially FlyingPress
- Strong debugging skills to identify and resolve session caching issues
- Ability to deliver a stable, working solution within budget

Ideal Skills and Experience:
- Proven track record in fixing similar issues
- Familiarity with WordPress caching and performance optimization
- Good communication skills for project updates

Please provide examples of similar work done and ensure you can meet the budget.