Secure Customer Data on Magento 2

I'm seeking an experienced Magento 2 developer to address a critical security issue. After recent caching adjustments to speed up my website, customers can now see other customers' details upon logging in. I want to maintain the current cache settings as much as possible while preventing this exposure.

The specific customer details being exposed are:
- Contact information
- Order history

Requirements:
- Expertise in Magento 2 security and caching mechanisms
- Ability to diagnose and fix data exposure issues without major changes to existing cache settings
- Experience with full-page cache configurations

Ideal Skills and Experience:
- Proven track record with Magento 2
- Strong understanding of caching and data security
- Problem-solving skills to maintain performance while securing sensitive information

Please provide a plan of action with your bids.