Tuning, optimization, support. Complex, Linux server administration. More than 10 years in the field of system maintenance of hosting services: web servers (apache, nginx), vds / vps, mysql, postgresql, dns, iptables. Excellent knowledge of cloud virtualization systems (VMware VSphere, ESXi). I work in a circle with colleagues on narrower IT issues: the development of websites and web applications in PHP, Bitrix. My last project: https://gole.ms/