● Nodejs: socket.io,mssql,express, Jade,gulp(basic),RxJS.
● HTML5/CSS3/JS(ES5/6)/TS (Angular 2+(basic), React+Redux(basic), RxJS, jquery, ajax, bootstrap, socket.io ,sipjs , highcharts.js, canvasjs, semantic ui)
● SQL: MSSQL(SSIS), MySQL, SQLite, join, union, subqueries, etc.
● Experience in: PHP, Java, Python, good knowledge: shell(bash).
● Experience in the field of IP telephony. Administration Asterisk - configuration, implementation of telephone systems, writing dialplan(standart, AEL), AMI, AGI(bash, php, python). The configuration of the various IP phones (Cisco, Gigaset, Grandstream), softphones (Xlite, Zoiper), ATA (Grandstream, Linksys), VoIP equipment (GoIP, Dinstrar, OpenVox) and mix them with Asterisk.
● Skills in working with Zabbix \ Nagios monitoring systems, and backup Bacula backup system. The configuration of the server-side, client monitoring, backup Windows \ Unix.
● Configuring network equipment (D-Link, Cisco, TP-Link, MikroTik), laying and installation network.
● Experience with virtualization systems based on Proxmox, VMware, Hyper-V. Deploying and configuring virtual machines Windows \ Unix.
● Administration Skills Windows \ Unix systems. (Windows Server 2003/2008/2012, CentOS, Debian)
● Support for workstations based on Windows \ Unix. Setting up office suites, email clients, control of user rights, limit the use of the Internet, protection against malicious software, and so on.