Troubleshoot Hacked E-Commerce WordPress on AWS

I need a WordPress and PHP expert with AWS experience to troubleshoot hacked files on my e-commerce website.

Issues:
- I've detected suspicious code or files on the site.
- The site begins redirecting to these malicious URLs after user login.

What's been done:
- I have restored the site from a backup, but the problem persists.

Ideal Skills:
- Extensive experience with WordPress, PHP and AWS.
- Strong understanding of e-commerce website architecture.
- Proven track record in cybersecurity and troubleshooting hacked websites.

Please bid if you have relevant experience and can help secure the site.