- January 2017 - present (4 years 4 months)
- IT Hardware, Software
Maintaining linux services and servers for the company.
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automatic ubuntu deployments
bash scripting various migrations
virtualization of physical servers
mail, vpn and ssl web servers
- April 2015 - present (6 years 1 month)
- IT Hardware, Software
Implementing and maintaining various linux services and servers for the Adobe Pass and Adobe Concurrency Monitoring
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ansible (automating push deployment for various states)
puppet ( automating various package and service configuration )
drbd ( HA block device replication )
grafana ( graphical interface for status )
tcollector ( various scripts to monitor EVERYTHING in a machine and its processes )
Systems Administrator, BITDEFENDER SRL, Bucharest
- November 2014 - March 2015 (5 months)
- IT Hardware, Software
Implementing and maintaining various linux services and servers for internal servers and services for an internal research and development department..
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Scripting - Various scripts to automate simple tasks (like bringing tunnels up and down and setting up services for them
Networking - Set up tunnels via openvpn with some firewalls
Deployment - Setting up centos and ubuntu machines with automated setup depending on the service
IT Systems Administrator, BITDEFENDER SRL, Bucharest
- April 2013 - October 2014 (1 year, 6 months)
- IT Hardware, Software / Programming, Support / Helpdesk
Implementing and maintaining various linux services and servers for internal and external users.
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I implemented and maintained all linux internal servers and services as an IT System Administrator at Bitdefender in Bucharest HQ.
I participated in taking decisions for all linux related machines/projects. Also, I manage the hardware part ( analysing the requirements, upgrading whatever is needed.. (CPU/RAM/DISK) cleaning , installing ESX and integrating in VCenter ) including the management part ( IPMI/KVM configuration )
Some of the products used are the following:
DNS ( with dynamic updates, DNSSEC)
DHCP integrated with DNS ( and tftp for PXE )
Web Servers ( Apache (with low level auth via mod_lua), nginx with php-fpm )
SQL ( mysql/mariadb in a master/slave environment )
Mail ( postfix + dovecot with virtual users for different internal and external users and mailing lists including DKIM signing )
(T)FTP (proftpd, vsftpd with virtual users in a chrooted environment )
Authentication ( slapd with multiple domains )
Proxy ( squid with caching and various types of auth like kerberos, basic, ntlm )
Storage ( Samba integrated with ActiveDirectory auth )
LVM/Raid ( hardware and software(md), iscsi, nfs, zfs )
Firewall ( iptables mostly with ipset and some pfsense )
Routing ( VLANs, PVLANs, source based packet routing and DMZ seggregation )
Balancing ( via modules or hardware devices for web/sql )
VoIP ( Asterisk with SQL and IVR in AEL )
Logging ( Centralised Rsyslog with SQL Backend )
Monitoring ( SNMP traps )
Protection ( Fail2ban , SELinux and custom rules for hardened security )
Backup ( Bacula or inhouse scripting )
Honeypots ( with SNORT as IPS/IDS with custom rules for various traffic )
Chat ( IRC and Jabber ( OpenFire ) with various bots for services status and updates )
Audio ( Shoutcast web radio service with various pulseaudio clients routing )
Virtualisation ( VMWare ESX )
Monitoring ( Zabbix )
I've also done PHP/Bash scripting and web interfaces for DHCP/DNS selfservice.
Various penetration testing, security, performante and implementations for web/java/linux internal products.
Used and managed Amazon's cloud services ( for virtual machines, dns, storage, load balancing, networking ).
Made custom scripts to filter different AS ( iptables + ipset for DMZ ).
Implemented Atlassian systems and services ( Confluence,Jira,bamboo,fisheye,crucible,crowd) with SSL and SSO and other testing and tracking like testlink, glpi.
Segregated networks in a DMZ environment with PVLANs and NAT based on "only minimal required/needed ports/protocols".
Automating various tasks like SSL signing, user deactivation in various services ( puppet/chef )
Maintaining a personal distribution as a template for various servers in a VMWare virtualized environment requested by the teams with custom modifications for various packages.
I'm mostly using CentOS and Gentoo on the server side.
Can do BASH, PHP fluently but I can also read Perl/Python fairly easy ( just didn't need them thatmuch ).
http://bitdefender.com/sve/ - Homepage
- August 2011 - March 2013 (1 year 7 months)
- Software / Programming
Coding Perl and bash scripting for automation, stress testing and performance monitoring
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I worked as a software testing engineer for Bitdefender's Security for Virtualized environments.
Some of the products used are the following:
VMWare ( ESX, VMCenter )
Coding ( Bash/Perl for various testing )
Testing ( Selenium, TestLink, Sikuli, OpenQA )
NOSQL ( Mongo for various queries for the backend )
Automation ( Puppet )
I was working on functionality testing, stress testing the product's web interface and the backend linux VM.
That implied writing tests for the inhouse test mechanism for various architectures.
I had to recommend improvements on usability and recommend various setups needed to simulate the customer's experience.
Infrastructure Systems Administrator, Platinium Andreea Net, Bucharest
http://platiniumtv.ro/ - Homepage
- Octomber 2010 - August 2017 (6 years 10 months)
- IT Hardware, Software / Programming
Configuring networking and coding management interfaces for various services and alerting systems.
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I'm working incident-based/part-time for an ISP as an IT Network Administrator in Bucharest for which I've created the whole infrastructure from the ground up.
Some of the products used are the following:
Routing ( Quagga, Cisco L2/L3 Switches )
PPPoE ( Linux concentrator based on RP-PPPoE )
Radius ( FreeRadius for AAA )
I've created the web interfaces for managing the clients PPPoE accounts.
Monitoring/alerting with nagios/cacti ( developed custom templates ).
Mail and web servers for the company users.
I'm also taking care of the CISCO routers, GePON fiber nodes management, all and any tech needs that might arrive.
Ttroubleshoot various client problems that might affect a branch or the whole network.
I've set up VPN machines using openvpn with GRE tunneling ( tun / tap )
Programmer, Freelancer, Bucharest
http://www.freelancer.com/u/dexter01.html - Profile
- 2008 - 2011 (3 years)
- IT Hardware, Software / Programming
Coding mostly for automatic scrapping, maintenance and administering services.
Made all sorts of crawlers for different websites.
Management interfaces for various mass services.
IT Infrastructure Administrator, S.c. Eniasan S.r.l., Motru
http://eniasan.ro/ - Homepage
- July 2007 - October 2009 (2 years 3 months)
- IT Hardware, Software / Programming, Telecom
Implemented from the ground up and managed the linux servers and services for the CMTS/Fiber clients. Set up all the routing and monitoring of the network. Integrated security and authentication methods.