Securing Node.js and React Website

I need an experienced security expert to fix vulnerabilities in my Node.js and React website. The primary focus should be on preventing leaking of database information, but all security issues need to be addressed.

Key tasks include:
- Comprehensive security scan
- Fixing leaks: usernames/passwords, API keys, database info
- Implementing encryption, access control, and regular audits

Ideal skills and experience:
- Strong background in web application security
- Proficiency in Node.js and React
- Experience with encryption and access control
- Track record of successful security projects

Please provide evidence of relevant experience in your application.