Client had two high-performance web servers (web & DB separated) however, Magento's performance, esp on category pages was very slow More than 30 seconds for some pages. I tuned MySQL to rid bottle, tuned both Linux servers for better I/O and esp disk I/O for DB server. Tuned Apache, upgraded PHP (manual install).
Extensive experience in designing scalable & highly available services with Linux, including 10+ years working with freelance clients and corporate employers on Linux and Windows administration projects.
Frequent jobs include website migration, website optimization (Wordpress, Drupal, Joomla, Magento), Apache tuning, NGINX setup, MySQL performance and optimizing PHP for speed. I also have 3+ years of experience with Amazon Web Services - EC2, Cloudfront, S3, Route 53, RDS and SES.