If you want to reduce spam or automated bots, then you can automatically block them with WP Job Openings. WP Job Openings supports reCAPTCHA and Akismet which is very helpful for preventing spam. WP Job Openings PRO supports reCAPTCHA v3 also, which validates the user by a score based on the user actions on your site.
You can configure it from the settings:
Akismet: WP Job Openings Settings -> Form -> General.
The option to enable the Akismet anti-spam protection will only be shown when the Akismet plugin is active on your site.
reCAPTCHA: WP Job Openings Settings -> Form -> reCAPTCHA.