Hi Sir,
I am individual expert shopify developer. I am here to help you and build your store as you are looking for. I have made much customization in to shopify theme like testament, district, supply, debut, and others.
I have the skills that you are looking for so please give me a chance to work with you long time and contribute my self with you.
I have experience to embed javascript plugin and external app in to shopify store to add the more external functionality to the store.
So please provide your precious time to discuss the job in details so that I can gave my best to you.
Please hire me, and i promise you that i never let you down.
Thanks and Regards,
Nafees SN