Professionally system administration of Novell NetWare, FreeBSD, Linux (Debian, Ubuntu), CoreOS (RancherOS) and Windows (2003/2008/2012) servers for the last 15 years.
Deep knowledge of Linux (nginx + php-fpm, mysql, mariadb, percona, postfix, dovecot, zabbix, monit, redis, memcached, mongodb, bind, docker, kubernates, elasticsearch, influxdb, grafana, collectd, prometheus, gitlab, ispconfig and etc.) and Windows (AD, DHCP, DNS, WSUS, RDS, Hyper-V).
Knowledge of network equipment Cisco, D-Link, TP-Link, Ubiquiti, HP.
Hobby: radio engineering, programming for embedded systems, IoT (esp8266, esp32), computer vision systems (OpenCV), programming for Windows (Delphi) and Linux (C, Golang, Shell).