PHP/MySQL Expert for Web Platform Review

Looking for PHP / MySQL Back-End Expert to Review & Analyze Web Platform
Hi,
I own a Transport Live Exchange (transport marketplace) web platform, currently ~95% completed and in beta testing.

The platform is built using:

Linux hosting

PHP (Back-end)

MySQL (Database)

I am looking for an experienced back-end developer to help with:

reviewing and analyzing the existing back-end logic

identifying bugs, bottlenecks, or architectural issues

reviewing database structure and queries

providing optimization recommendations (performance, security, scalability)

checking front-end to back-end integration

I am not looking to rebuild the platform, but for a serious technical review with clear feedback and improvement suggestions.
If the collaboration goes well, there is potential for long-term work.

Requirements:

strong experience with PHP & MySQL

good understanding of complex web application logic

experience with marketplace / platform-based systems is a big plus

problem-solving mindset and attention to detail

Budget:

Negotiable, depending on experience and involvement.

I can provide platform access, demo, and screenshots.

To apply, please include:

a short overview of your experience

technologies you work with

examples of similar projects (if available)