1.) Install "CentOS Minimal" on defined VPS hosting (details will be provided to successful bidder)
2.) Install and configure "Virtualmin GPL" control panel + create Virtualhost (will be OpenCart)
Install PHP modules: MCrypt, APC, Memcache, Curl + everything additional if needed
Install mod_pagespeed and memcached
3.) Secure the server (SSH, IPTables, Sysctl, network settings, various system tweaks)
4.) Configure Apache, MySQL, Memcached, PHP, mod_pagespeed for maximum performance.
All software needs to be the latest one (if possible) and must not be installed avoiding package manager.
The websites performance will have to be A,A,A,A,A according to [url removed, login to view] and A,A according to gtmetrix.com.
Successful freelancer will have to provide comprehensive documentation of what was done to achieve such results, so it can be reproduced on other VPS in future.