Hi,
I have gone through with " Opencart version update " project details and am very confident I can do this.
I have extensive experience as senior Web developer; my experience aligns immensely well with your Posting.
Here you can check my portfolio: https://www.freelancer.com/u/Expertdevelopr29
Your satisfaction is more important than money, you only need to pay when your project is completed. There are no risk for you.
I do have couple of questions you can message me so that we can discuss further.
Thanks,
Neha :)