Need a Joomla expert to perform the following tasks:
1. Upgrade the Joomla version from [url removed, login to view] to [url removed, login to view]
2. Increase the website loading speed, and minimizing processing load to enable efficient use of server resources
Problem no is that the website has gone through numerous custom changes to the core codes and files. Therefore we need an expert to upgrade the Joomla with the current functions intact.