Adam Wrona

* Continuous experience in IT system administration for more than 10+ years.
* Knowledge and practical experience with deployment and administration of Unix/Linux servers (Debian/Ubuntu, RHEL/Centos).
* Wide range of knowledge with virtualization (VMware/Proxmox/CloudStack/Libvirt) and containerization (Docker/Lxc).
* Experience with AWS stack.
* Good understanding of common IT security practices.
* Experience in building and maintaining hybrid infrastructures.
* Knowledge and practical experience in Advanced Networking including building and supporting local and global networks, ACLs, firewalls, VPN tunnels, advanced routing.
* Experience with application & infrastructure monitoring in production environment (Nagios/Checkmk/Grafana/Munin).
* Experience with log management tools (Kibana/Logstash/Filebeat)
* Proficient understanding of Git.
* Experience implementing CI/CD (TeamCity).
* Experience with configuration management tools (Puppet).
* Good skills in scripting languages (Bash, Python).
* Good understanding software development process, everyday duties will include cooperation with development and QA teams.
* Agile methodology to collaborate with QA, Product Management, Developers in regular sprint cycles.

Specialization:
Administration of www, application servers, load balancing, virtualization operating systems, monitoring devices, services, automation management.

* Administration systems and infrastructure that supports services: erdbeerlounge.de, mamilounge.de, stylr.de, empfehlerin.de. Total coverage of these domains is approximately 1 500 000 visits/month. Ensuring continuity of servers and constant supervision of their load and performance.
* Constant contact with external clients from Germany and a group of programmers working on the project.
* Develop schedule of work and exchange of information between the client, a group of developers, investors and other persons managing the project. The creation of four independent application environments (platforms:programming, testing, pre-production, production, enabling work to different groups), implementation of a version control system (Subversion), project management system JIRA.
* Load-balancing – hardware (Cisco ACE, Nortel Networks Alteon) as well as software (HAProxy, Varnish).
* Administration of Linux servers (Debian, Centos) for IBM BladeCenter platforms.
* Administration of Windows servers 2003/2008.
* Database Administration: MSSQL 2005/2008, MySql, PostgresSQL (performance, backup, replication).
* Monitoring and managing servers, network devices: Nagios, Mrtg, Collectd, Puppet.
* Server virtualization: VMware vSphere Hypervisor (ESXi), Proxmox (OpenVZ)

* Responsible for directing and controlling the tasks performed by network administrators.
* Contacts with external and internal client.
* Configuration and administration of high availability clusters of HA (GFS, iSCSI).
* Load balancing of servers and providing high availability of services.
* Administration of Linux servers (Debian, Centos) and Windows Server2003/2008 for IBM BladeCenter platforms.
* Server virtualization: OpenVZ, VMWare, VirtualBox - increasing the level of use existing servers, consolidation andcstandardization of services and data processing.
* Planning and running a maximum automated systems and secured that serve a variety of network services, such as:
ssh, dns(bind, mydns, powerdns, geodns), dhcp(dhcpd), ftp(proftpd vsftpd), www(apache, nginx, lighttpd, tomcat),
mail(postfix, sendmail, exim), vpn(IPSec), proxy(squid, DansGuardian), nfsv4, samba, php(fcgi, apc, eaccelerator, memcached, lucene, solr, varnish), ejabberd, openldap and many others.
* Responsible for the implementation of multi-layer access control system of the company (multi-step authentication, which clearly confirms the user identity, user permissions hierarchy, determination and implementation of IT security procedures). Analyzing the level of network security, servers, workstations (metasploit, nessus, pakiti2, aircrack-ng, nmap, uplook, auditpro).
* Database Administration: MySql, PostgresSQL, MSSQL2005, CouchDB, MongoDB (performance, backup, replication).
* Traffic profaling: CBQ, HTB, firewall(iptables, ipac-ng, fail2ban).
* Monitoring of servers, network devices:: Nagios, Mrtg, Cacti, Munin.
* Performance management servers running services: yellowpages.pl, yp.pl, ojej.pl, netmama.pl, co.pl, l.pl, sectorpages.com , picfor.me, export.tv, bildero.com, stickapps.com and others. Total range of these domains is about 2 000 000 visits/month.
* Implementation, administration CMS: Wordpress, Joomla, Drupal, MODx, phpBB, Typo3, DokuWiki, CRM: SugarCRM, Webshop: Magento, Prestashop, OpenCart, Streaming server: Kaltura, WHM: ISPConfig, cPanel, Groupware software: Zimbra Collaboration Suite, Jira.
* Implementation and administration of version control systems (Subversion, Git).

* Responsible for managing a IT-team, maintaining and developing critical IT services company.
* Contacts with external and internal client.
* Complex administration of LAN and WAN in the company. Administration of Microsoft server 2003/2008 Server, Microsoft Exchange Server 2003/2007, MSSQL 2005, ISA Server 2006, Linux (Debian, Centos), network solutions including the standards of the bank (Cisco).
* The introduction of the security policy of operating systems, servers and network services, security audits as required for financial sector companies.
* The implementation of network projects, preparation and a full service network projects and transfer to production.
* Create a VPN between the regional offices (about 30) and the Headquarters, based on the IPSec protocol.
* Implementation of e-gate system, a complex system for communication and exchange of information between customers, regional offices and headquarters based on a MSSQL 2005 database and PHP programming language.

* LAN Administration, Windows 2000/2003 and Linux servers (Debian, Fedora), for internal company, software development (PHP and Java Script).
* The reorganization of a network of servers with the transition from Windows 2000 to version 2003, the introduction of new safety rules, preparation of network in accordance with the requirements of redundancy at work 16 hours a day 6 days a week.
* The transfer of the entire Internet infrastructure company (website, DNS server, mail) to local resources running under Linux (debian)