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resume.html
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resume.html
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layout: default
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title: Resume
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---
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<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>
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<div itemscope itemtype="http://schema.org/Person">
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<p>
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I am <span class="b" itemprop="name">Gergely Polonkai</span>
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(sometimes referred to
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as <span itemprop="nickname">W00d5t0ck</span>
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or <span itemprop="nickname">Polesz</span>), a <span class="b"
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itemprop="jobTitle">software developer, systems engineer and
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administrator</span>. I was born on <span class="b"
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itemprop="birthDate">7 March, 1983</span> in Budapest,
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Hungary. I spent my life moving here-and-there in the country,
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and finally settled in <span class="b" itemprop="address"
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itemscope itemtype="http://schema.org/Address">
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<span itemprop="locality">Budapest</span></span>.
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</p>
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<p>
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You can reach me on
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<span class="b" itemprop="email">gergely@polonkai.eu</span>,
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or by phone on <span class="b" itemprop="telephone">+36 (30)
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7375-706</span>. I fluently speak and
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write <span class="b">English</span>
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and <span class="b">Hungarian</span> and currently learning Icelandic.
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</p>
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<p>
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I have <span class="b">graduated in 2001</span>
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from <span class="i">Táncsics Mihály Szakközépiskola,
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Szakiskola és Kollégium</span>, an architecture high school
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based in Veszprém, Hungary. There, I learned
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about <span class="b">electricity and elevators</span>, while
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getting my feet wet in the area of IT systems
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engineering. Together with some teachers, we
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developed <span class="b keyword" title="network building">the
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IT infrastructure of the school, building it from
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scratch</span> with <span class="b keyword">Windows XP</span>
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based clients, and <span class="b keyword">Debian
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GNU/Linux</span> servers with <span class="b keyword">Squid
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proxy</span>, an <span class="b keyword">Apache httpd</span>
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web server, <span class="b keyword">Exim</span>+<span class="b
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keyword">Courier IMAP</span> based internal mailing and
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a <span class="b keyword">Samba file server</span>. Meanwhile,
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I have created the school’s first <span class="b keyword"
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title="web development">web page</span> using <span class="b
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keyword">Perl CGI</span>, and later it’s replacement
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in <span class="b keyword">PHP</span>. Although I did that as
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a student, I consider it my first job.
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</p>
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<p>
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My first contract was made in <span class="b">2002</span> with
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a small Budapest based ISP that served Internet connection to
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a large warren. I have mastered Linux based <span class="b
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keyword" title="firewalls">firewalling and routing</span>
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there using <span class="b keyword noupper">iptables</span>,
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and <span class="b keyword" title="QoS">tc for QoS</span>. I
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have also created a <span class="b">web page</span> for the
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company using <span class="b keyword">PHP</span>
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and <span class="b keyword" title="MySQL database
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development">MySQL</span>.
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</p>
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<p>
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After that I contracted with a small <span class="b">web
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development company</span> in <span class="b">2004</span>.
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Here I was in the role of both a <span class="b keyword"
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title="web development">web developer</span> and
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a <span class="b keyword" title="Systems
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administration">systems administrator</span>. I have
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mastered <span class="b keyword">PHP</span> there, together
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with <span class="b keyword">MySQL administration</span>. I
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also built a small <span class="b keyword"
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title="routers">router</span>/<span class="b keyword"
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title="firewalls">firewall</span> out of a PC for office
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needs.
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</p>
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<p>
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My next job came in <span class="b">2006</span>, when I
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contracted with a small <span class="b">VoIP company</span>
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developing a call center software based on <span class="b
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keyword">Asterisk</span>. My job here was to create a base
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system for this software as small as possible, while managing
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the old, Ubuntu based ones. For the new version we
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targeted <span class="b keyword">Gentoo Linux</span> because
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of its possible small size, and performance reasons.
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</p>
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<p>
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The job that followed was with a world-wide IT services
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company in <span class="b">2007</span>, where I became a
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member of a large team supporting and administering several
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thousand servers, mostly based on <span class="b keyword">Red
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Hat Enterprise Linux</span> and <span class="b keyword">SUSE
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Linux Enterprise Server</span>. There I mastered cluster
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technologies (both <span class="b keyword">Heartbeat 2</span>
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and <span class="b keyword">Red Hat
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Cluster</span>), <span class="b
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keyword">SAN</span>, <span class="b keyword
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noupper">iSCSI</span> and <span class="b keyword">NFS</span>
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based storages, <span class="b keyword">Apache httpd</span>
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and <span class="b keyword">Tomcat</span> web servers,
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administration of <span class="b keyword" title="MySQL
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administration">MySQL</span> and <span class="b keyword"
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title="Oracle 10g Database Administration">Oracle 10g
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Database</span>s, <span class="b keyword">Bacula</span> based
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backup, <span class="b keyword">Windows 2003 Server</span>
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and <span class="b keyword">Windows Server 2008</span> (both
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standalone and cluster) with <span class="b keyword">Active
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Directory</span>, <span class="b keyword">Group
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Policy</span>, <span class="b keyword">Microsoft Exchange
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Server 2005</span> and <span class="b keyword">Microsoft SQL
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Server 2005</span>, <span class="b keyword">Xen Open
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Source</span> virtualization, <span class="b keyword">Citrix
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XenServer</span> and <span class="b keyword" title="Citrix
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XenApp">XenApp</span>, <span class="b keyword">VMware
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ESXi</span> and <span class="b keyword" title="VMware
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vSphere">vSphere</span>, <span class="b keyword">Nagios</span>
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monitoring (and <span class="b keyword">monitoring</span> in
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general), and last, but not least, <span class="b
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keyword">Linux hardening</span> (<span class="b
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keyword">SELinux</span>, firewalls of different kinds,
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fighting <span class="b keyword">application security</span>
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issues).
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</p>
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<p>
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All this knowledge came in very handy, when I went to a
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leading Hungarian financial company
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in <span class="b">2010</span>. The IT infrastructure was in a
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very bad shape there, and my job was to rebuild the Linux
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parts from scratch. We utilized <span class="b keyword">Debian
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GNU/Linux</span> servers (both standalone and <span class="b
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keyword">Heartbeat 2</span> clusters), <span class="b
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keyword">Apache httpd</span> web servers, <span class="b
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keyword">Exim</span>+<span class="b keyword">Courier
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IMAP</span> for mailing, <span class="b keyword">Bacula</span>
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based backup, <span class="b keyword" title="MySQL
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administration">MySQL</span> and <span class="b keyword"
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title="PostgreSQL administration">PostgreSQL</span> database
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servers, <span class="b">Oracle Database</span>s
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(both <span class="keyword" title="Oracle 10g Database
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Administration">10g</span> and <span class="keyword"
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title="Oracle 11g Database
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Administration">11g</span>), <span class="b">Microsoft SQL
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Server</span>s (both <span class="keyword" title="Microsoft
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SQL Server 2005">2005</span> and <span class="keyword"
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title="Microsoft SQL Server 2008">2008</span>), <span class="b
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keyword">Windows 2003 Server</span> and <span class="b
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keyword">Windows Server 2008</span> (both standalone and
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clusters), <span class="b keyword">Active
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Directory</span>, <span class="b keyword">Group Policy</span>,
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centralised <span class="b keyword">ESET NOD32
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anti-virus</span>, <span class="b keyword">Windows
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cluster</span> based <span class="b keyword" title="Microsoft
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File Server">file server with AD
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backend</span>, <span class="b
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keyword">WSUS</span>, <span class="b
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keyword">OTRS::ITSM</span> helpdesk, <span class="b
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keyword">Zabbix</span> based monitoring, virtualization
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with <span class="b keyword">Citrix XenServer</span>, IT
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security solutions with <span class="b
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keyword">SonicWall</span> appliances, <span class="b
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keyword">SELinux</span>, <span class="b keyword">Snort</span>
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and <span class="b keyword
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noupper">iptables</span>, <span class="b keyword">Perl</span>
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for system administration scripts, and <span class="b
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keyword">PHP</span> and the <span class="b keyword">Symfony
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2</span> framework for internal web development. Although much
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has changed in this list since then, it was my best and most
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challenging experience so far.
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</p>
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<p>
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I left that company in <span class="b">2013</span> to work as
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a <span class="b">freelancer developer</span> and
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a <span class="b">systems engineer</span> for
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a <span class="b">startup network monitoring
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company</span>. Here we are building a help desk system using
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open source products like <span class="b
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keyword">OTRS::ITSM</span>, <span class="b
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keyword">OpenLDAP</span>, and <span class="b
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keyword">Zabbix</span>. I also dug my nose into <span class="b
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keyword">Docsis</span> based ISP networks and <span class="b
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keyword">SIP</span>-based telephony.
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</p>
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<p>
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Unfortunately our main employer went bankrupt
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in <span class="b">2014</span>, so after a few months of
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freelancing I got a new job at the R&D division of a
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leading telecommunications company. My current role is pretty
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close to DevOps. Nowadays I’m developing a <span class="b
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keyword">Django</span>-based internal web application, while
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maintaining internal scripts written in both <span class="b
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keyword">Perl</span>, <span class="b
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keyword">Python</span>, <span class="b keyword">bash</span>
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and
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<span class="b keyword">tcsh</span> or trying to migrate the
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internal source code repositories from <span class="b
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keyword">ClearCase</span> to <span class="b
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keyword">Git</span>.
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</p>
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<p>
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In my <span class="b">free time</span>, I wander in forests,
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take pictures, and sometimes manipulate them with
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the <span class="b keyword">GIMP</span>. Sometimes
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I <span class="b">write</span> short fantasy or sci-fi novels
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using <span class="b keyword">LibreOffice</span>. I am also
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developing some software in <span class="b keyword">C</span>,
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whose source code is managed with <span class="b
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keyword">Git</span>. When I’m not in the mood for writing, I
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go and check out the news on several technical areas, mostly
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IT and engineering, or give a try to a new programming
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language in the name of “why not?”.
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</p>
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</div>
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<div id="keywords"><span id="keywords-close"></span><span id="keywords-list"></span></div>
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<script type="text/javascript">
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var keywords = null;
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$(function() {
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$('[data-toggle="popover"]').popover({
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'html': true,
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'content': function(){
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if (keywords == null) {
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keyword_tags = $('.keyword');
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keywords = new Array();
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for (i = 0; i < keyword_tags.length; i++) {
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tag = keyword_tags[i];
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if ($(tag).attr('title')) {
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kw = $(tag).attr('title');
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} else {
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kw = $(tag).html();
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}
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first_letter = kw.charAt(0);
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remainder = kw.slice(1);
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if (!$(tag).hasClass('noupper')) {
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first_letter = first_letter.toUpperCase();
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}
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kw = '<span class="keyword-first-letter">' + first_letter + '</span>' + remainder;
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keywords.push(kw);
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}
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}
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keywords = $.grep(keywords, function(el, index){return index === $.inArray(el, keywords);});
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return keywords.sort(function(a, b) { if (a.toLowerCase() < b.toLowerCase()) return -1; else if (a.toLowerCase() > b.toLowerCase()) return 1; else return 0; }).join(', ');
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}
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});
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});
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</script>
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