Andrii Kondratiev

KEY INFORMATION

Currently I am working in the biggest hosting corporation in South-East regions. Total of maintaining customers is more than 700K.

The main goal of the work – designing and implementing new solutions and technologies, increasing SLI, reducing outages, quick finding and fixing problem, preventing outages.

My most valuable feature is fast learning and self-improvement. If I do not own any skills, then within a week or two I study it and I am ready to use it. Also I have opened «FOP» with 3th group of tax payment (5% of united tax / единий податок).

EDUCATION

Kryvyy Rih National University (2006-2012)

WORK EXPERIENCE

• 2011-2013 – FOP «TSURKAN», System administrator
• 2013-2014 – Suncoin Invest, LLC, System administrator
• 2014-2015 – Industrial Service LLC, System administrator
• 2015-2016 – Unisteel LLC, Computer Systems Engineer
• 2016- now — Dreamscape Network, LLC, Linux System Engeener.

SKILLS

UNIX-based operation systems:

• Linux system administration and engineering;
• FreeBSD administration;
• Working with Web servers: installing, configuring and maintaining Apache or /and Nginx + PHP + *SQL databases. Finding and quick fixing errors (500, 502 etc...), installing SSL certificates...
• Working with cPanel + CloudLinux (CentOS based system): installing, configuring and maintaining systems, working with built-in scripts and writing new, blocking DDoS attacks, updating WHM...
• Working with mail (currently is my work priority): installing, configuring and maintaining systems as on cPanel servers, and as standalone servers on pure systems. With our colleagues we built mail cluster using Debian + Exim + Dovecot + LDAP with more than 140 TB disk usage and ~100K customers. After creating mail cluster, we migrated all customer's mail from stanalone cPanel servers to cluster to reduce the load on the disk system.
• Working on configure management and quick deployment tools such as puppet (+ hierra) and SaltStack (pure SaltStack or with reclass or saltclass for more convenient and flexible nodes management). But I don't like using puppet. SaltStack is power!
• Working with virtualization technologies: KVM, Proxmox – creating, modifying VMs, proxmox clustering technologies, moving VMs between proxmox nodes. Also worked with Vmware. VirtualBox has been used not on production servers.
• Worked with load balancing: HAProxy, HeartBeat, Dovecot Director.
• Iptables, Mikrotik, fail2ban
• Data backup: database and dovecot replications, BRBD, Bacula
• Monitoring: Zabbix, OMD, Nagios
• Group working with Jira, Zendesk, writing technical articles for low-level system administrators and support managers.
• Scripting: BASH (middle level), Python3 (beginner);