Hey there, It seems that you want to use a simple spinning gif right after user press submit order button, I am eagerly interested in this project as it is exactly within scope of my expertise. I am myself a Sr. Opencart developer so you will directly work with me. No managers or mediators. I am committed to provide work at a quick turnaround time with top quality.
I would love to discuss with you further about taking this project on. I'm looking forward to reading from you soon, Thanks, Ron