Customization of Job Portal Website ( WP Job Manager + Jobify Theme)

Hello, I need few minor customization for my Job Portal Website. I need all the customization to be done in child theme to avoid loss during theme up gradation. Brief Details : Theme : Jobify Child Theme : Jobify-child Website : [login to view URL] Plugins : WP Job Manager, WP Job Alert,WP Job Manager Applications Customization 1 : Plugin : WP Job Manager Add-On - Applications Requirement : Here i want to limit user to apply maximum 2 jobs per day. [login to view URL] Hint : There is one functionality already built in the plugin that user can't apply to same job again. It means it is saving the data somewhere from where it is validating the same. Customization 2: Plugin : WP Job Alert Requirement : Whats happening currently is that user is able to define only one word or sentence in search box like "Oracle PL/SQL" and job alert matches this whole phrase only. Here i want to allow users to save multiple comma separated search criteria. So that user can create single job alert in case he possess multiple skills. Ex: "Oracle PL/SQL, JAVA,PHP" Hint : Some help can be taken from [login to view URL] Customization 3: Page : Jobify theme enabled Login model popup page Requirement : I want to add Google Recaptcha to it.