Hi there
I have reviewed your project summary regarding Shopify API expert needed to find undocumented fulfillment endpoint.. and surely can complete this project as per your given instructions.
I am a senior developer and designer having experience in web development and Web Designing using Core PHP, Laravel, WordPress, HTML, CSS, ReactJs, integration of 3rd Party API's.
My main focus is to give you the best result according to your requirements, message me so we can discuss further your project.
Thanks