Hello Chris,
I have read your job requirements very well and want to confirm you that I am Senior Wordpress developer and I will surely help you to Create Wordpress form for handling frontend submission with attachment according to your provided requirements,
As I have extensive experience in designing and developing websites using WordPress/Woo-commerce, Working with E-commerce website, theme development, plugin development, PHP, MySQL, HTML/CSS/Javascript, APIs Integration, AJAX, SEO, Forms, etc... PSD to WordPress/Drupal, customization of WP core for development of custom modules.
Thanks
Manu