Revision as of 05:16, 12 July 2015

Resume

Person

I am a very committed person who has an incredible curiosity with everything IT-related - whether it being technical, philosophical, humanistic, legal or thinking outside the box.

I've been around a lot of platforms and worked as a user, programmer, consultant and administrator. Combined it has given me a unique insight into the general use of IT, and has often helped me both to understand the problems, get ahead of them and be able to switch between them.

I have previously been self-employed for a number of years (hardware sales) and am familiar with the full spectrum of business understanding. Many of the applications that I have helped to develop has required knowledge and understanding of financial management.

My big interest and hobby is on the system-administration side.

Skills

Linux

Distributions: Debian / Ubuntu, Redhat / Centos, Gentoo
Mail Server: Postfix, exim, qmail and sendmail
Spam Scanning: MailScanner, spamassassin, amavisd and in-house developed
Web Server: Apache, lighttpd, nginx
DNS: Bind (with geo-aware setup for redelegation of traffic to different backends depending on location)
Backup: Bacula, rdiff / rsnapshot, scripting
VPN: OpenVPN, IPSec, PPTP, StrongSwan
Virtualization: XEN, KVM, vmware
Database: Postgresql, sqllite, DB2 and MySQL/MariaDB (with 3-node Galera setup with master-master functionality)
IP Telephony: Asterisk / FreePBX
Storage: CORAID, iSCSI, AoE, LVM, Ceph
Failover / redundancy: GlusterFS, Keepalived, Corosync, Pacemaker
Loadbalancing: ZEN, HAProxy, Varnish, DRBD
VCS: SVN, git, mercurial & perforce
Cloud: Amazon, OpenNebula, OwnCloud
Search: Solr, Elasticsearch
Deployment: 3-tiered deployment (testing, staging, production and failover / LB / scaling)
Build Engineering: CI (Continuous Integration) with TeamCity, Jenkins and Buildbot and configuration of build farms in a virtual environment with a mix of operating systems.
Monitoring: Munin, Icinga (Nagios spinoff), Shinken, Zabbix
Log analysis: Scripting, logstash, loganalyzer
Troubleshooting:
- Hardware (practical knowledge - all levels)
- Applications (netstat, strace, dtrace, lsof, gbd, pmap)
- Network (netstat, tcpdump, wireshark, strace, lsof)
Optimization of OS/apps looking at vmstat, iostat, kernel configs and balance between cpu/ram.
Profiling bottlenecks
Automation software: puppet, salt stack, chef

Development / scripting

As a programmer I've worked with:

Perl
Bash
Web
- PHP
- Javascript / JQuery / AJAX
Setup and maintenance of open source CMS (SilverStripe, TYPO 3 (ver 3 and 4), Drupal, Concrete5, joomla)
Setup and maintenance of eCommerce (osCommerce, Magento)
Java / Tomcat
Delphi
. NET (primarily C # and C++) and mono
Python
Lua
Ruby
C (understand the language, but will almost always choose either bash/perl/python for a job)

Professional life

I have been widely used as an [internal] consultant to find problems / solutions and generally used for sparring in all layers / aspects of the companies I've worked in.

For my earlier (and current) work experience, there is a link to linkedin at the end of this page.

Family and sparetime

Family-wise, I have a wife and two children (two boys). In my free time I like to bike & experiment with new technologies.

I am lucky to have a good fiber connection @ home and runs various mirrors for open source projects. It is often here I test a new idea (gfs, iscsi, aoe, failover / clusters, ceph) - before I start to implement in testing and finally to implement in production.

I relax the best by reading/researching new technologies/areas and generally just testing myself with various scenarios.

Contact info

Name: Martin B. Nielsen
Location: Denmark
Email: martin@skytech.dk

Links / more info

Media	Link
[WIKI] - Linux projects/research	Linux
[WIKI] - Development projects/research	Development
Twitter	https://twitter.com/zethrok
LinkedIN	http://www.linkedin.com/pub/martin-b-nielsen/8/4/743
Facebook	https://www.facebook.com/jinx42
IRC	Find me as user Zethrok on these networks: OFTC, EFNet, Freenode, Mozilla

@@ Line 29: / Line 29: @@
 * VCS: SVN, git, mercurial & perforce
 * Cloud: Amazon, OpenNebula, OwnCloud
-* Search: Solr
+* Search: Solr, Elasticsearch
 * Deployment: 3-tiered deployment (testing, staging, production and failover / LB / scaling)
 * Build Engineering: CI (Continuous Integration) with TeamCity, Jenkins and Buildbot and configuration of build farms in a virtual environment with a mix of operating systems.
-* Monitoring: Munin, Icinga (Nagios spinoff), Shinken
+* Monitoring: Munin, Icinga (Nagios spinoff), Shinken, Zabbix
 * Log analysis: Scripting, logstash, loganalyzer
 * Troubleshooting:
 ** Hardware (practical knowledge - all levels)
-** Applications (netstat, strace, dtrace, lsof, gbd)
+** Applications (netstat, strace, dtrace, lsof, gbd, pmap)
 ** Network (netstat, tcpdump, wireshark, strace, lsof)
 * Optimization of OS/apps looking at vmstat, iostat, kernel configs and balance between cpu/ram.
@@ Line 57: / Line 57: @@
 * Python
 * Lua
+* Ruby
 * C (understand the language, but will almost always choose either bash/perl/python for a job)

Resume: Difference between revisions