$test = function( $term_id, $tt_id, $taxonomy ) {
        if ( is_admin() && is_tax( 'software-developers' ) ) {
            $parent_term = get_term($term_id, $tt_id);
            if(!is_wp_error($parent_term)) {
                wp_insert_term(
                    $parent_term->name.' Bonuses',
                    'software-developers',
                    array(
                        'description' => '',
                        'parent' => $parent_term['term_id'],
                        'slug' => 'bonuses-'.$parent_term->slug
                    )
                );
            }
        }
    }
    add_action( 'create_software-developers', '$test', 10, 3 );