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<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
 * Implements hook_node_type_insert().
 */
function non_recruiter_node_type_insert($content_type) {
  if ($content_type->type == 'job_template_2') {
      $body_instance = node_add_body_field($content_type, t('Job Description'));
        $body_instance['display']['non_recruiter_list'] = array(
        'label' => 'hidden',
        'type' => 'text_summary_or_trimmed',
    );

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'job_template_2';
  field_create_instance($instance);
}
  }
}

/**
 * Implements hook_form().
 */
function job_template_2_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}

<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
 * Implements hook_node_type_insert().
 */
function non_recruiter_node_type_insert($content_type) {
  if ($content_type->type == 'job_template_2') {
      $body_instance = node_add_body_field($content_type, t('Job Description'));
        $body_instance['display']['non_recruiter_list'] = array(
        'label' => 'hidden',
        'type' => 'text_summary_or_trimmed',
    );

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'job_template_2';
  field_create_instance($instance);
}
  }
}

/**
 * Implements hook_form().
 */
function job_template_2_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}

<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
* Implements hook_node_type_insert().
*/
function non_recruiter_node_type_insert($content_type) {
if ($content_type->type == 'job_template_2') {
  $body_instance = node_add_body_field($content_type, t('Job Description'));
    $body_instance['display']['non_recruiter_list'] = array(
    'label' => 'hidden',
    'type' => 'text_summary_or_trimmed',
);

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'non_recruiter';
  field_create_instance($instance);
}
}
}

/**
 * Implements hook_form().
 */
function non_recruiter_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <-----
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <--------
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}

There is unmatched value for key 'field_name' => 'non_recruiter_quantity' in the function _non_recruiter_installed_fields() and _non_recruiter_installed_instances() do it similar as you wanna

I have tested. problem resolved.

<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
 * Implements hook_node_type_insert().
 */
function non_recruiter_node_type_insert($content_type) {
  if ($content_type->type == 'job_template_2') {
      $body_instance = node_add_body_field($content_type, t('Job Description'));
        $body_instance['display']['non_recruiter_list'] = array(
        'label' => 'hidden',
        'type' => 'text_summary_or_trimmed',
    );

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'job_template_2';
  field_create_instance($instance);
}
  }
}

/**
 * Implements hook_form().
 */
function job_template_2_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'node_example_quantity',
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}

<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
* Implements hook_node_type_insert().
*/
function non_recruiter_node_type_insert($content_type) {
if ($content_type->type == 'job_template_2') {
  $body_instance = node_add_body_field($content_type, t('Job Description'));
    $body_instance['display']['non_recruiter_list'] = array(
    'label' => 'hidden',
    'type' => 'text_summary_or_trimmed',
);

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'non_recruiter';
  field_create_instance($instance);
}
}
}

/**
 * Implements hook_form().
 */
function non_recruiter_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <-----
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <--------
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}

<?php

/**
 * Implements hook_node_info().
 */
function non_recruiter_node_info() {
  // We define the node type as an associative array.
  return array(
      'job_template_2' => array(
          'name' => t('Job Template 2'),
          'base' => 'job_template_2',
          'description' => t('A content type for posting your jobs.'),
          'title_label' => t('Job Template 2'),
          'locked' => TRUE,
      ),
  );
}

/**
* Implements hook_node_type_insert().
*/
function non_recruiter_node_type_insert($content_type) {
if ($content_type->type == 'job_template_2') {
  $body_instance = node_add_body_field($content_type, t('Job Description'));
    $body_instance['display']['non_recruiter_list'] = array(
    'label' => 'hidden',
    'type' => 'text_summary_or_trimmed',
);

// Save our changes to the body field instance.
field_update_instance($body_instance);

// Create all the fields we are adding to our content type.
foreach (_non_recruiter_installed_fields() as $field) {
  field_create_field($field);
}

// Create all the instances for our fields.
foreach (_non_recruiter_installed_instances() as $instance) {
  $instance['entity_type'] = 'node';
  $instance['bundle'] = 'non_recruiter';
  field_create_instance($instance);
}
}
}

/**
 * Implements hook_form().
 */
function non_recruiter_form($node, $form_state) {
  return node_content_form($node, $form_state);
}


function _non_recruiter_installed_fields() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <-----
          'cardinality' => 1,
          'type'        => 'text',
      ),
  );
}


function _non_recruiter_installed_instances() {
  return array(
      'non_recruiter_quantity' => array(
          'field_name'  => 'non_recruiter_quantity', <--------
          'label' => t('Quantity required'),
          'type'        => 'text',
          'widget'      => array(
              'type'    => 'text_textfield',
          ),
          'display' => array(
              'non_recruiter_list' => array(
                  'label' => 'hidden',
                  'type' => 'hidden',
              ),
          ),
      ),
  );
}