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Sources of the site gergely.polonkai.eu, Jekyll version
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---
layout: default
title: Resume
---
<h3>Resume <a id="keywords-button" data-toggle="popover" data-placement="bottom" role="button" tabindex="0" data-trigger="focus">[ want some keywords only? click this! ]</a></h3>
<div itemscope itemtype="http://schema.org/Person">
<p>
I am <span class="b" itemprop="name">Gergely Polonkai</span>
(sometimes referred to
as <span itemprop="nickname">W00d5t0ck</span>
or <span itemprop="nickname">Polesz</span>), a <span class="b"
itemprop="jobTitle">software developer, systems engineer and
administrator</span>. I was born on <span class="b"
itemprop="birthDate">7 March, 1983</span> in Budapest,
Hungary. I spent my life moving here-and-there in the country,
and finally settled in <span class="b" itemprop="address"
itemscope itemtype="http://schema.org/Address">
<span itemprop="locality">Veresegyház</span></span>.
</p>
<p>
You can reach me on
<span class="b" itemprop="email">gergely@polonkai.eu</span>,
or by phone on <span class="b" itemprop="telephone">+36 (30)
7375-706</span>. I fluently speak and
write <span class="b">English</span>
and <span class="b">Hungarian</span> and currently learning Icelandic.
</p>
<p>
I have <span class="b">graduated in 2001</span>
from <span class="i">Táncsics Mihály Szakközépiskola,
Szakiskola és Kollégium</span>, an architecture high school
based in Veszprém, Hungary. There, I learned
about <span class="b">electricity and elevators</span>, while
getting my feet wet in the area of IT systems
engineering. Together with some teachers, we
developed <span class="b keyword" title="network building">the
IT infrastructure of the school, building it from
scratch</span> with <span class="b keyword">Windows XP</span>
based clients, and <span class="b keyword">Debian
GNU/Linux</span> servers with <span class="b keyword">Squid
proxy</span>, an <span class="b keyword">Apache httpd</span>
web server, <span class="b keyword">Exim</span>+<span class="b
keyword">Courier IMAP</span> based internal mailing and
a <span class="b keyword">Samba file server</span>. Meanwhile,
I have created the school’s first <span class="b keyword"
title="web development">web page</span> using <span class="b
keyword">Perl CGI</span>, and later it’s replacement
in <span class="b keyword">PHP</span>. Although I did that as
a student, I consider it my first job.
</p>
<p>
My first contract was made in <span class="b">2002</span> with
a small Budapest based ISP that served Internet connection to
a large warren. I have mastered Linux based <span class="b
keyword" title="firewalls">firewalling and routing</span>
there using <span class="b keyword noupper">iptables</span>,
and <span class="b keyword" title="QoS">tc for QoS</span>. I
have also created a <span class="b">web page</span> for the
company using <span class="b keyword">PHP</span>
and <span class="b keyword" title="MySQL database
development">MySQL</span>.
</p>
<p>
After that I contracted with a small <span class="b">web
development company</span> in <span class="b">2004</span>.
Here I was in the role of both a <span class="b keyword"
title="web development">web developer</span> and
a <span class="b keyword" title="Systems
administration">systems administrator</span>. I have
mastered <span class="b keyword">PHP</span> there, together
with <span class="b keyword">MySQL administration</span>. I
also built a small <span class="b keyword"
title="routers">router</span>/<span class="b keyword"
title="firewalls">firewall</span> out of a PC for office
needs.
</p>
<p>
My next job came in <span class="b">2006</span>, when I
contracted with a small <span class="b">VoIP company</span>
developing a call center software based on <span class="b
keyword">Asterisk</span>. My job here was to create a base
system for this software as small as possible, while managing
the old, Ubuntu based ones. For the new version we
targeted <span class="b keyword">Gentoo Linux</span> because
of its possible small size, and performance reasons.
</p>
<p>
The job that followed was with a world-wide IT services
company in <span class="b">2007</span>, where I became a
member of a large team supporting and administering several
thousand servers, mostly based on <span class="b keyword">Red
Hat Enterprise Linux</span> and <span class="b keyword">SUSE
Linux Enterprise Server</span>. There I mastered cluster
technologies (both <span class="b keyword">Heartbeat 2</span>
and <span class="b keyword">Red Hat
Cluster</span>), <span class="b
keyword">SAN</span>, <span class="b keyword
noupper">iSCSI</span> and <span class="b keyword">NFS</span>
based storages, <span class="b keyword">Apache httpd</span>
and <span class="b keyword">Tomcat</span> web servers,
administration of <span class="b keyword" title="MySQL
administration">MySQL</span> and <span class="b keyword"
title="Oracle 10g Database Administration">Oracle 10g
Database</span>s, <span class="b keyword">Bacula</span> based
backup, <span class="b keyword">Windows 2003 Server</span>
and <span class="b keyword">Windows Server 2008</span> (both
standalone and cluster) with <span class="b keyword">Active
Directory</span>, <span class="b keyword">Group
Policy</span>, <span class="b keyword">Microsoft Exchange
Server 2005</span> and <span class="b keyword">Microsoft SQL
Server 2005</span>, <span class="b keyword">Xen Open
Source</span> virtualization, <span class="b keyword">Citrix
XenServer</span> and <span class="b keyword" title="Citrix
XenApp">XenApp</span>, <span class="b keyword">VMware
ESXi</span> and <span class="b keyword" title="VMware
vSphere">vSphere</span>, <span class="b keyword">Nagios</span>
monitoring (and <span class="b keyword">monitoring</span> in
general), and last, but not least, <span class="b
keyword">Linux hardening</span> (<span class="b
keyword">SELinux</span>, firewalls of different kinds,
fighting <span class="b keyword">application security</span>
issues).
</p>
<p>
All this knowledge came in very handy, when I went to a
leading Hungarian financial company
in <span class="b">2010</span>. The IT infrastructure was in a
very bad shape there, and my job was to rebuild the Linux
parts from scratch. We utilized <span class="b keyword">Debian
GNU/Linux</span> servers (both standalone and <span class="b
keyword">Heartbeat 2</span> clusters), <span class="b
keyword">Apache httpd</span> web servers, <span class="b
keyword">Exim</span>+<span class="b keyword">Courier
IMAP</span> for mailing, <span class="b keyword">Bacula</span>
based backup, <span class="b keyword" title="MySQL
administration">MySQL</span> and <span class="b keyword"
title="PostgreSQL administration">PostgreSQL</span> database
servers, <span class="b">Oracle Database</span>s
(both <span class="keyword" title="Oracle 10g Database
Administration">10g</span> and <span class="keyword"
title="Oracle 11g Database
Administration">11g</span>), <span class="b">Microsoft SQL
Server</span>s (both <span class="keyword" title="Microsoft
SQL Server 2005">2005</span> and <span class="keyword"
title="Microsoft SQL Server 2008">2008</span>), <span class="b
keyword">Windows 2003 Server</span> and <span class="b
keyword">Windows Server 2008</span> (both standalone and
clusters), <span class="b keyword">Active
Directory</span>, <span class="b keyword">Group Policy</span>,
centralised <span class="b keyword">ESET NOD32
anti-virus</span>, <span class="b keyword">Windows
cluster</span> based <span class="b keyword" title="Microsoft
File Server">file server with AD
backend</span>, <span class="b
keyword">WSUS</span>, <span class="b
keyword">OTRS::ITSM</span> helpdesk, <span class="b
keyword">Zabbix</span> based monitoring, virtualization
with <span class="b keyword">Citrix XenServer</span>, IT
security solutions with <span class="b
keyword">SonicWall</span> appliances, <span class="b
keyword">SELinux</span>, <span class="b keyword">Snort</span>
and <span class="b keyword
noupper">iptables</span>, <span class="b keyword">Perl</span>
for system administration scripts, and <span class="b
keyword">PHP</span> and the <span class="b keyword">Symfony
2</span> framework for internal web development. Although much
has changed in this list since then, it was my best and most
challenging experience so far.
</p>
<p>
I left that company in <span class="b">2013</span> to work as
a <span class="b">freelancer developer</span> and
a <span class="b">systems engineer</span> for
a <span class="b">startup network monitoring
company</span>. Here we were building a help desk system using
open source products like <span class="b
keyword">OTRS::ITSM</span>, <span class="b
keyword">OpenLDAP</span>, and <span class="b
keyword">Zabbix</span>. I also dug my nose into <span class="b
keyword">Docsis</span> based ISP networks and <span class="b
keyword">SIP</span>-based telephony.
</p>
<p>
Unfortunately our main employer went bankrupt
in <span class="b">2014</span>, so after a few months of
freelancing I got a new job at the R&amp;D division of a
leading telecommunications company. My current role is pretty
close to DevOps. Nowadays I’m developing a <span class="b
keyword">Django</span>-based internal web application, while
maintaining internal scripts written in both <span class="b
keyword">Perl</span>, <span class="b
keyword">Python</span>, <span class="b keyword">bash</span>
and
<span class="b keyword">tcsh</span> or trying to migrate the
internal source code repositories from <span class="b
keyword">ClearCase</span> to <span class="b
keyword">Git</span>.
</p>
<p>
I left that company in 2016, as such a slow moving giant couldn’t
really keep up with my pace. I signed with another startup creating
games capable of analysing work behaviour. Here we mainly use
<span class="b keyword">Flask</span>,
<span class="b keyword">Cassandra</span>, and
<span class="b keyword">Tensorflow</span>. Unlike the previous one,
this is a true learning organization, and given its size, it is
capable of taking quick turns if market changes (and that’s exactly
what I need).
</p>
<p>
In my <span class="b">free time</span>, I wander in forests,
take pictures, and sometimes manipulate them with
the <span class="b keyword">GIMP</span>. Sometimes
I <span class="b">write</span> short fantasy or sci-fi novels
using <span class="b keyword">LibreOffice</span>. I am also
developing some software in <span class="b keyword">C</span>,
<span class="b keyword">Python</span>, and
<span class="b keyword">Vala</span>, whose source code is managed
with <span class="b keyword">Git</span>. When I’m not in the mood
for writing, I go and check out the news on several technical areas,
mostly IT and engineering, or give a try to a new programming
language in the name of “why not?”.
</p>
</div>
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