Hi there,
If you want your button to go directly to a URL instead of opening out the ‘apply’ box, you can override job-application.php and make it contain the following code instead:
<?php if ( $apply = get_the_job_application_method() ) : ?>
<?php if ( 'url' === $apply->type ) : ?>
<div class="job_application application">
<a href="<?php echo esc_url( $apply->url ); ?>" class="application_button button" target="_blank" rel="nofollow">Apply Now</a>
</div>
<?php else : ?>
<?php wp_enqueue_script( 'wp-job-manager-job-application' ); ?>
<div class="job_application application">
<?php do_action( 'job_application_start', $apply ); ?>
<input type="button" class="application_button button" value="<?php _e( 'Apply for job', 'wp-job-manager' ); ?>" />
<div class="application_details">
<?php
/**
* job_manager_application_details_email or job_manager_application_details_url hook
*/
do_action( 'job_manager_application_details_' . $apply->type, $apply );
?>
</div>
<?php do_action( 'job_application_end', $apply ); ?>
</div>
<?php endif; ?>
<?php endif; ?>
You can take a look at our documentation page here if you want more details.