Opencart 3.x Security Upgrade

I'm seeking a skilled Opencart developer to help me upgrade my current Opencart platform from 3.x to the latest version. The primary goal of this upgrade is to enhance the security of my site.

Key requirements for this project include:
- Upgrading Opencart from 3.x to the latest version
- Updating custom extensions and themes to ensure compatibility and functionality post-upgrade
- Ensuring the overall security of the site is enhanced

Ideal candidates for this project should have:
- Proven experience in Opencart development and upgrades
- Proficiency in managing custom extensions and themes
- A strong background in security measures and best practices for e-commerce platforms

Please only apply if you have direct experience with similar Opencart upgrade projects and can demonstrate a solid understanding of e-commerce security protocols.

Additional Notes -

Opencart Actions Needed

Multistore Journal
allsecurityelectronics, ipnetworkvideo.com, safetyproductswholesale.com, allgeovision.com, all2gig.com

Current Versions
Opencart – 3.0.3.2
Journal – 3.0.37

Upgrade Opencart to latest version

Upgrade Journal to latest version

Make sure template and layouts stay in tact and update as necessary

Make sure Paypal commerce payment integration works and perform minor customizations to make the checkout clear and smooth

Make sure UPS integration continues to work

Review all extensions and make sure they continue to work