ERP Enhancement and Security Setup

I need to fix backend functionality of an ERP built on Replit. The project involves:

- Fixing errors and improving login security.
- Adding data encryption, two-factor authentication, and setting up regular security audits.
- Moving the application to run on Synology or a VPS.
- Setting up an LDAP server to control access. Usernames should be email addresses.

Ideal skills and experience:
- Experience with ERP systems, Replit, Synology, and VPS.
- Strong background in backend development and security protocols.
- Familiarity with LDAP server setup.

Please provide relevant experience in your bids.