- April 2015 - March 2025 (10 years)
- IT Hardware, Software
Implementing and maintaining various linux services and servers for internal servers and services for the projects I was involved in.
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AdobePass and Concurrency Monitoring - Doing On call for the product. Automate deployments, infrastructure, scaling, monitoring, alerting.
Python, BASH, Puppet, Ansible, Saltstack. Linux CentOS, DRBD, Pacemaker, Corosync. NewRelic, UltraDNS, CMDB.
HBase with OpenTSDB and Grafana then Prometheus.
Automated testing and packaging via Jenkins CI/CD
99.99 Uptime SLAs. So DR/HA was a must.
0 downtime deployments and migrations across continents and clients distribution.
Infrastructure as code so everything in terraform was in git.
AWS R53, EC2, VPC deployments
Linux knowledge of internals and identify in bash and python scripting
Analytics - untangle thousands of database servers issues to make on-call quieter.
Python automation with various APIs via REST or SOAP.
Various SQL queries to identify the status of the service
Docker for testing, scaling, deployments.
Systems Administrator, MuseGlobal, Craiova
- January 2017 - May 2023 (6 years)
- IT Hardware, Software
Implementing and maintaining various linux services and servers for internal servers and services for the projects I was involved in.
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Taking care of all servers and related services. (Mail,DNS,Networking,WEB servers, backup and replication)
Debian deployment, configuration and maintenance.
Docker packaging for demos.
Bacula for backup and recovery
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, split-horizon)
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 )
NFS/Samba for users
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 ).
https://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 (Company closed a few years later)
https://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 was 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 things I've done are the following:
Configure Switching and Routing ( Quagga for BGP sessions, Cisco L2/L3 Switches )
GePON fiber nodes management
VPNs with Openvpn tun/tap
PPPoE ( Linux concentrator based on RP-PPPoE )
Radius ( FreeRadius for AAA )
Asterisk for SIP voice systems
Custom web interface for self-service managing PPPoE clients and restrictions
Custom templates for nagios/cacti
Hosted web (apache httpd, redis / memcached, mariadb) and mail servers (postfix/dovecot)
Troubleshooting mostly networking, software implementations and clients issues
Programmer, Craiova
https://www.famouswhy.com/
- 2009 - 2013 (4 years)
- IT Hardware, Software / Programming
Helped develop some map modules on the site in PHP. Helped maintain and debug performance issues and move it to new hosting.
Programmer, Freelancer, Craiova
https://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 (Company sold to UPC a few years later)
https://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.
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Some of the things I've done are the following:
Managed the fiber and CATV clients. Created the network adminitration and monitoring tools.
Tehnologii folosite: Linux(Gentoo) - Routing BGP
FreeRadius + SQL - for auth
PPPoE - Networking Connections
CMTS(Cisco) , GePON(Fiber) - Networking transport
Servere Mail(Postfix,Dovecot/Courier) - based on client needs
FTP(Proftpd)+Mysql/Web(Apache)
PHP/MySQL and others - Management interfaces create de mine.
Custom templates for nagios/cacti
Hosted web (apache httpd) and mail servers (postfix/dovecot)
Troubleshooting mostly networking, software implementations and clients issues