Participation in maintaining, support and implementation of SaaS project ( high load web system ).

 Scripting manual tasks to make them fully automated ( perl, bash )
 Planning and developing and implementation of changes at the SAAS system
 Mysql fail-over( mysql master-master-slave replication, mysql-MMM )
 Ldap authorization system, replication and fail-over
 Provisioning system ( puppet, foreman )

August 2011 – Present  Kiev

Privately Held; 201-500 employees; Internet industry

June 2011 – August 2011

Participation in maintaining, support and implementation of SaaS project ( high load web system ).

 Scripting manual tasks to make them fully automated ( perl, bash )
 Planning and developing and implementation of changes at the SAAS system
 Mysql fail-over( mysql master-master-slave replication, mysql-MMM )
 Ldap authorization system, replication and fail-over
 Provisioning system ( puppet, foreman )

Privately Held; 201-500 employees; Internet industry

March 2011 – June 2011

SAAS team. 2-nd level support.

Responsible for:
 Scripting manual tasks to make them fully automated ( perl, bash )
 Developing plug-ins for Nagios, Cacti and Facter ( perl, bash, ruby )
 Monitoring and support high-load web system.
 Ticket handling.

Privately Held; 501-1000 employees; Telecommunications industry

October 2007 – August 2010

Convergent GSM billing support.

Responsible for:
 billing system support(based on: Solaris, Oracle, tomcat, apache)
 on-site support of billing system integration at international projects
 problem handling(otrs system, direct customer communication)
 troubleshooting and investigation
 monitoring system development
 1st Level product support

Technologies:
Solaris, Linux, Perl, Shell Scripting, Oracle, tomcat, apache, xml, snmp, RRDTools.

Senior System Administrator

Privately Held; 201-500 employees; Computer Software industry

January 2007 – March 2009

Full time (Jan.2007-Oct.2007)
Part time (Nov.2007-Mar.2009)

Designing and implementing computers system for Ukrainian’s certification authority according to Ukrainian and international (ISO 27001) security standards. System installation, maintaining and support. Support developers in system administration related issues.

Responsible for:
 Web-servers(load balancing and high available)
 Databases(backups and replications)
 Central backup-system(designed and written by me on perl)
 Communication stuff (hard access restrictions)
 Monitoring system(developing and support)
 Mail system
 Central log system

Technologies:
Exim, pop3d, dbmail, mysql, apache, nginx, php, ldap, rewrite, mysql,
OpenVPN, squid, nagios, snmpd, rrdtools, Cisco Catalyst 2950,2960,2970 & PIX515E.

August 2006 – January 2007

Support integrators in implementing new and upgrading existed ones database for Ukrainian National traffic police (migration from SybaseESE to Oracle 9i databases).

Responsible for:
 Company Web server
 Mail system
 Internet Access
 Fileservers
 Local and Migration Database support
Technologies:
Linux, apache, mysql, tomcat, sendmail, pop3d, PostgreSQL, spamassasin,
clamav, Mysql, Oracle, vsftpd, samba, squid.