Fix details and improve Website on Joomla

General information for the website: Website providing info about our B2B services
Kind of development: Customization of existing website
Description of requirements/features: We are looking for someone to finish building our website on Joomla.
We would like to work with someone who can show initiative and work without direct supervision.

Specifics:
1. Visually, make mysteria.metzlerbrotherseu.mysteria.pl, look like mysteria.pl while keeping current structure and galleries.
2. Optimize photo sizes etc, make sure it works faster.
3. Check security of the site, make sure everything is safe.
4. Make sure the site is compatible, with different browsers and systems, fixing anything that's wrong.
5. Prepare the currently off shop module for future launch.
6. Make suggestions regarding issues we may have missed.
7. Generally, make the site bulletproof.

When applying please send us a short plan describing how and in what order you would fix on our site.
Once again please remember that most of all we need somebody who shows initiative, and notices issues themselves.

We apologize but due to the usually large number of applications, we will only respond to the best candidates.
Extra notes: