Job Search – Replace job_type checkboxes with multi-select dropdown

Hi,

Is there any way to replace the Job Types checkboxes displayed above the job listings (filters section) with a multi-select dropdown (showing its corresponding hierarchy) in addition to custom code?

In case it can only be modified by code, which files should I update besides the job-filter-job-types.php file ?

Do you have any guide or reference to do this?

Thanks.