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Bartlomiej Leszak | Elance
 
176985602337900
Last Sign-in: Jan 1, 2015

Bartlomiej Leszak

Knowledge, intelligence, experience and dedication
   Poland
  |   Warszawa, mazowieckie

Overview

Minimum Hourly Rate $27

10+ years experience in IT:
* systems
* virtualization
* HA and LB solutions
* security
* databases
* network
* programming

Read More »
Feb 20, 2013|System Administration|$99|Completed
Jan 31, 2013|Other IT & Programming|$45|Completed
Jan 14, 2013|Networking & Security|$0|Completed

View All »

Skills (10)

Tested
.NET Framework
Active Directory
PHP
Network Security
Apache Administration
C
C#
Cisco
Embedded Systems
Firewall

Service Description

AREAS OF EXPERTISE

* Systems administation: Linux (RedHat, Debian, Ubuntu), FreeBSD, Windows (Windows 2003 Server MCSA)
* Network administration: VLAN, VPN, Wireless networks, Network equipment managment (Nortel, HP, Cisco), Deep understanding of network architecture,
* High availability: active-passive clusters (RHCS, Linux-HA), load-balancing techniques, clustered file systems (DRBD, GFS/OCFS, GlusterFS)
* Security: firewalling (iptables, ipfw, ipf/pf), antivirus techniques, antispam techniques (both before- and after- queue), SELinux (including writ ing custom policies), PKI
* Database administration: MySQL, PostgreSQL, Oracle, SQL
* Network services administration: www (apache, nginx), mail (postfix, sendmail, exim, dovecot, cyrus), DNS (bind, dnsmasq), LDAP (openldap)
* Virtualization: Xen, KVM, VMWare (ESX/ESXi, VSphere), libvirt API, OVF
* Programming: Perl, PHP, sh scripting, C/C++, Applescript, VBScript, Python, Java

SPECIALTIES

* designing and implementing HA systems
* performance tuning, identifying and solving bottleneck issues
* designing physical and logical network layout
* designing network and systems monitoring infrastructure
* using open-source technologies to deliver enterprise-class services
* combining different techlogies to deliver HA with both enterprise and commodity hardware

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Employment

SoftAware
Owner
2012 - Present
Company providing all sorts of IT services.
Intrasoft-TSI sp. z o.o.
Network / Systems Engineer
2008 - 2012
- administrators' team leadership - designing a nd implementing HA systems - designing and implementing monitoring systems - designing and implementing buisiness processes within organization...
2A sp. z o.o.
Network / Systems Engineer
2002 - 2008
- technical department managment - network design - implementing new services - systems administration (FreeBSD, Linux, Windows) - configuration managment

Education

Warsaw University of Technology
M. Sc., IT, Electronics, Telecommunication
2003 - 2005
Warsaw University of Technology
B. Sc., Telecommunication Systems and Networks
1999 - 2003

Keywords

mysql
cluster
postgresql
linux
freebsd
systems
administration
shell
scripting
perl
My Snapshot
Elance Level
Level represents activity and experience on Elance. Freelancers start at Level 1 and achieve higher levels through their work. A higher "Level" indicates greater earnings, ratings and other achievements on Elance. Learn More »
  • 12 months
  • Lifetime
Jobs
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0
Total
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Identity
Username
f1xxx3r
Type
Individual
Member Since
November 2012
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Bartlomiej Leszak | Elance

Bartlomiej Leszak