My usual job is resolving of any kind of troubles with Linux, Windows and Web applications. Also Monitoring, Load Balancing, Performance Optimization, Migration, Backups, DDOS Defence and information security. I can reduce chance of system failure and optimize configuration to get maximum performance. My expirience is over 15 years. Customer's satisfaction is my main goal. Web: Nginx, Apache, HAProxy. Databases: MS SQL, MySQL, MongoDB, Aerospike, Tyrant, Memcache, Redis. Virtualization: Hyper-V, VMware, OpenVZ, KVM. Cluster: DRDB, Heartbeat E-mail: MS Exchange, Postfix, Sendmail, Exim. Networks: Cisco, Juniper, Mikrotik. Programming languages that I know: PHP, Java, Node.JS, C.