PHP Upgrade Specialist Needed

Project Description:

I need to hire a PHP migration expert freelancer to upgrade my PHP project to the latest stable version.

Project Details:
I have an application/system developed in PHP
Current version is PHP [insert your current version 7.2
I need to migrate it to PHP to last version

Specific Objectives:
Upgrade PHP code to compatible version
Resolve incompatibilities and deprecated functions
Update dependencies and libraries if necessary
Perform comprehensive post-migration testing
Ensure everything works correctly after migration

Freelancer Requirements:
Proven experience with PHP migrations (please include examples in your proposal)
Deep knowledge of differences between PHP versions
Ability to identify and resolve compatibility issues
Organized methodology and clear communication
Availability for coordination meetings if needed

Budget and Timeline:
Budget: fixed
Estimated deadline: one week

For your proposal, please include:
Your experience with similar migrations
Examples of successfully migrated projects
Your working methodology for this project
Time and cost estimation
Availability to start

Important:
The project is in production, I need assurance of no downtime
I will provide code access and existing documentation
I prefer milestone-based work with verifiable deliverables