Custom shortcode generated using dynamic value from listing in WP Job Manager Field Editor (example is for AccessPress Twitter Feed Pro)

functions.php

<?php
add_shortcode( 'wpjmfe_ap_twitter_feed', 'smyles_custom_ap_twitter_feed' );

function smyles_custom_ap_twitter_feed( $atts ) {

	// Empty output by default
	$output = '';

	// This should be the actual shortcode to call
	$actual_shortcode = 'ap-twitter-feed-pro';

	// Get "dynamic" value to use in shortcode from listing
	$twitter = get_custom_field( 'company_twitter' );

	// This should be an array of attributes to use when building the shortcode
	$attributes = array(
		'template'      => 'template-7',
		'username'      => $twitter,
		'total_feeds'   => '3',
		'follow_button' => 'true'
	);

	// We only want to output if there is a value for the dynamic part
	if ( ! empty( $twitter ) ) {

		// First open our new shortcode
		$generated_shortcode = '[' . $actual_shortcode;

		// Next add all attributes to it
		foreach( $attributes as $attribute => $attribute_value ){
			$generated_shortcode .= " {$attribute}='{$attribute_value}'";
		}

		// Close generated shortcode
		$generated_shortcode .= ']';

		// generate content with do_shortcode()
		$output = do_shortcode( $generated_shortcode );
	}


	return $output;
}