Unless your target candidate is from Europa, they are likely on Facebook. With over a billion daily active users, this platform should not be ignored by any brand. When using this platform, there are many factors that you should weigh including company size, brand recognition & budget.
BEGINNER: BECOME AN ADMIN OF YOUR CORPORATE FACEBOOK PAGE
This page is usually owned by your marketing or communications team. They can add you as an admin allowing you to post occasional career content and place target ads to custom audiences.