Hi there!
I have rich experienced with chrome extension..
As you can see my background, I have alread made some extensions.
So I can help you perfectly...
Please let me know what you want in your backend, then I can start to work immediately.
Also, I have rich experienced web developing using PHP, Nodejs, and Python..
Don't hesitate to reach out, I would love to help you get started!
Looking forward to hearing from you soon.
Thank you, Regard