In order to have a role, a user should login 1st. Not logged in user can not have any role.
As home page is available to the public I offer you replace those links for not logged in users with the registration/login links.
And add a filter for automatic redirection after login to the restricted page according to the assigned role. Like this:

add_filter('login_redirect', 'redirect_user_after_login', 10, 3);
function redirect_user_after_login($redirect_to, $request, $user) {
    if (isset( $user->allcaps ) && is_array( $user->allcaps )) {
        //check for admins
        if (!empty($user->allcaps['administrator'])) {
            // redirect them to the default place
            return $redirect_to;
        } else if (!empty($user->allcaps['candidate'])) {
            $redirect_to = home_url() .'/post-resume';
        } else if (!empty($user->allcaps['employer'])) {
            $redirect_to = home_url() .'/post-job';
        } else {                                                                                            
            return home_url();
    } else {
        return $redirect_to;