Experience of maintenance of PostgreSQL servers of high availability and loading, 24x7, backuping and restoring data. Deploying and configuring CentOS 7, Postgresql( with backup,failover - hot standby), monitoring(zabbix). Setting up scheduller pgagent, connection pool pgbouncer for Postgresql. Participation in development of database structure, setting up partition mechanism for tables, searching "bottle necks" on queries layer, postgresql configuration settings level, hardware level. pl/pgsql skills. Selection of a complete set harware(supermicro, Disk Array Enclosure (DAE), raid storage controllers, assembling and configuring hardware. Supporting development stand(jenkins). Using bash-scripts for single tasks and routines. Deploying, administration XenServer with backuping, migration virtual machines