jQuery issue resolution for a legacy website (WordPress)

We are looking for an experienced freelancer to assist us with the technical maintenance of our WordPress website. Currently, several features are no longer functioning properly, and an expert has pointed out that the issues are likely due to outdated jQuery code. You will analyze the existing list of errors, resolve jQuery conflicts, and modernize outdated code sections without compromising the site’s stability. Experience with maintaining existing web applications, debugging, and working with legacy code is required. Backups must be performed before making any changes to the live system, and the functionality of the affected areas must be ensured.