Nowadays technology allows you to develop portals or business of this type with wordpress and offer an interesting added value to both candidates and companies, although it is true that at a generic level it is difficult to gain a foothold, at niche and microniche levels or at corporate or local level, these solutions can provide interesting options.
And what solutions exist to implement online work with wordpress?
Jobboard: Very customizable theme, you can customize all the buttons and options that exist in the theme as well as the fields you require for both candidates and companies. With good integration options for payment systems. And responsive, ie, any company or candidate can access perfectly through the mobile.
JobJockey: Online job system for wordpress also very well developed, like the previous one, which allows you to work with candidates and companies, in addition to incorporating flippers so that both candidates and companies can know when they have options and interest in their profiles.
Jobify: Very simple to implement and work, perhaps one of the most. It integrates with other plugins that allows the integration of post from other portals to start having job offers published and start generating traffic, it also integrates with Woocommerce to include premium and payment options in the online job system, etc.
Omega: Online job system for wordpress with a corporate design, has a free version for when it is only 1 company who is going to hire and paid versions for multi-company options (up to 20 companies). Very interesting for business groups.