I've already developed shopify app that function is same as your requirement.
"Cargo Deliveries and pickups". You can check it from the shopify app store.
We should use Carrier Service for it.
Hi, Dear!
Nice to meet you!
I have to say, this job post really stuck out to me – I’m a perfect fit for this project.
A bit about me...
I am a Shopify Expert with nearly 5+ years of professional experience.
HTML, Javascript and CSS, Shopify Liquid is my primary skill.
I have rich experience with Shopify polaris, Shopify Liquid, Node.js, php, Shopify graphql, Shopify restful api, third party api integration, Mysql, Mongodb for Shopify.
I've managed on many shopify stores with several companies, customized 5+ shopify themes and stores and developed 15+ embedded, non-embedded shopify apps..
I am very familiar with theme customization, theme extensions.
You can check themes and apps that I've developed from my profile.
Go ahead and shoot me a quick message here on Upwork so we can chat a bit more about yourself and the project. I’ll be at my computer for the rest of the day.
Thank you.
Taras Diakiv