Sergey Ivanov Email and Phone Number

Installed RedHat IPA (Identity, Authentication and Policy management system) and migrated services from old separate Bind DNS, Kerberos, NTP and Autofs systems to it.Set up a few application servers in Illumos zones (IMAP, Gitolite, Rackmonkey, mirrors, IPS package repository, and Solaris IPS packages building zone.Set up new OmniOS servers with manual redundancy for mail, homes, and projects data served by NFS with ZFS backend and Kerberos authentication for some of the shares.Designed and set up a new mail service architecture integrated with IPA, including mail spam/virus firewalls (Barracudas), mail routers, SMTP servers, Mailman and IMAP servers.Migrated management of all Linux servers and supported desktops to the Puppet Configuration Management system, recently upgraded it to a recent version of the Puppet.Integrated Puppet through R10k with gitolite server to have dynamic environmentsautomatically created, updated and deleted on branch creation, update and remove of git topic branch.Set up Mcollective orchestration system, integrated with Puppet, with ActiveMQ middleware and SSL certificate based authentication.Set up OpenSSH certificate authority to manage ssh certificate based authentication and authorization.

Participated in oncall rotation with monitoring of about 5000 metrics on more than 500 servers of different clients.Planned and performed corporate mail migration from Courier IMAP mail server to Zimbra Collaboration Server.Migrated corporate authentication system from OpenLDAP to Sun Directory Server.Implemented corporate Role-Based Access Control in Sun DSE.Planned and implemented IMAP mail system migration for the client with about 10 000 mailboxes from different old IMAP servers to high available Zimbra cluster.Installed and set up trending and monitoring systems (Nagios, Cacti, Ganglia, Circonus) integrated with oncall notification and internal documentation.Did RPM, DEB, SVR v4 and IPS software packaging for internal company software, organized Yum and IPS repositories.Investigated and helped adaptation in the company of many new technologies like OpenVZ lightweight virtualization, Solaris zones, Zimbra mail and collaboration system, Sun Directory Server, Dovecot IMAP Server.Mentored Google summer of code 2011 Linux Foundation project "Hot File system Backup using Ext4 Snapshots".

Developed and supported distributed system for Yellow Page advertising.Wrote Perl CGI scripts for report generation for Microsoft IIS web server.Participated in creation of environment for the development of distributed system using rsync server and STunnel (SSL tunnel wrapper) on CYGWIN on Windows.

Organized software development environment for Animatek World Builder under control of CVS at the Linux server with SSH protected access for all developers, and HTTPS secure web access to sources on Apache and CVSWeb.Developed and implemented efficient rendering method for Digital Element’s World Builder, with support of transparent layers and anti-aliasing algorithms.

Created and implemented poll management system with storage in Sybase-11 database, Apache serving Perl CGI scripts, and HTML pages with JavaScript as clients.Designed and implemented databases and software for call center information services on Sybase-11 DBMS server.