Maintenance & Rewrite of a Legacy Application

For a large client I was part of a team that maintained and rewrote a big application, developed since PHP 5, without a framework.

As a developer I was handling tasks like:

resolving bugs

developing Behavioural tests for validating and maintaining existing functionalities

rewriting of the legacy application, from the ground up, ensuring that existing integrations, user flows and specific reports will remain up and used as expected