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(Updated 2024-01-12)Experienced IT Consultant
Copenhagen, Denmark
Native Danish, Fluent English
- 20Y+ experience with software development PHP, Python, C#, MySQL/PostgreSQL
- 20Y+ experience with security and operations, Auditing, Design, Automation
- 20Y+ experience with Open Source Technologies, Linux, BSD, Hadoop, ZFS
Skills (34)
Ansible
Patching
Python
PHP
BUSINESS TO BUSINESS
SHELL SCRIPTING
JSON
SOFTWARE DEVELOPMENT
Bash
INTRANET
NESSUS
Project Management
API
PERFORMANCE OPTIMIZATION
Git
STRUCTURED SOFTWARE
LOGGING
WordPress
STATISTICS
WOOCOMMERCE
SMS
REVERSE ENGINEERING
GSM
Perl
Marketing
DELPHI
Hadoop
APPLICATION PROGRAMMING
C#
Visual Basic
.NET
GPS
CONTINUOUS INTEGRATION/DELIVERY
GraphQL
Professional Experience
Site Reliability Engineer
DK Hostmaster A/S
2022-01 - 2024-01
DK Hostmaster is the sole operator of the danish top level domain name ".DK", i was part of the operationsteam which where responisble for the technical part of keeping the infrastureture runing, my main resposibilities where optimization of our Ansible based infrastructure, re-writing roles for updating large numbers of server, re-designing our entire load-balancer setup and finally troubleshooting and/or reverse engineering of a huge Ansible-based automation installation.
I was choosen for this job due to my heavy Linux experience and many years of experience in maintaining authoritative DNS Servers.
Technologies: Linux, FreeBSD, Ansible, Python, Gitlab, Bind, HAProxy, RabbitMQ, Keepalived, Oracle, Microsoft Cloud / Azure, C#/.NET, Nagios, Prometheus, Grafana, Backup and Disaster Recovery Strategy Planning.
I was choosen for this job due to my heavy Linux experience and many years of experience in maintaining authoritative DNS Servers.
Technologies: Linux, FreeBSD, Ansible, Python, Gitlab, Bind, HAProxy, RabbitMQ, Keepalived, Oracle, Microsoft Cloud / Azure, C#/.NET, Nagios, Prometheus, Grafana, Backup and Disaster Recovery Strategy Planning.
Mikjaer Consulting ApS
2004-01 - 2024-01
In my own consulting business i have been solving many different assignments for customers of varying sizes, a non exhaustive list below: ●Uptours.eu - Travel agency ●Siope.eu - european society for Paediatric Oncology ●Tv3 - Danish Television, we made an online game for the populair reality show Paradise hotel ●Thisted Andelskasse, Bank ●Folkesparekassen, Bank ●IFKA, Analysis Institut ●Danmarks.net, Marketing Company Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 ●Cohaesio.net, Hosting Company ●Thyfisk.dk, Webshop selling fsh online ●Budosport, Webshop selling martialarts supplys Technologies: We used several technologies among else Linux, FreeBSD, VMWare, Nagios, BackupPC, PHP, MySQL, Apache, Bind.
Software developper and infrastructure specialist
RentalTrax ApS
2014-01 - 2024-01
is a Danish company providing software for rental companies worldwide, I have been in charge of deploying a load-balancer and implementing backup on the servers of the company.
I have also been developping different integrations and API solutions during the last year, among others I designed and implemented their entire client API.
Projects I did for RentalTrax: ● Load Balancer ● Client Rest API ● Letsencrypt Integration ● TrippleTex / Billy Integration ● WooCommerce Wordpress Plugin Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 Technologies: Linux, Ansible, HAProxy, Nginx, Backuppc, Rsync, SSH, Wordpress, REST.
2018 Software developper and performance optimization InterGastro A/S is a company selling industrial kitchenware to restaurants and cafes across the country, I did all the technical configuration of a business to business webshop, which made sure that the resturant-rep could only order spareparts that fits their current equipment.
Technologies: Linux, Wordpress, MySQL, MySQL Profiler
I have also been developping different integrations and API solutions during the last year, among others I designed and implemented their entire client API.
Projects I did for RentalTrax: ● Load Balancer ● Client Rest API ● Letsencrypt Integration ● TrippleTex / Billy Integration ● WooCommerce Wordpress Plugin Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 Technologies: Linux, Ansible, HAProxy, Nginx, Backuppc, Rsync, SSH, Wordpress, REST.
2018 Software developper and performance optimization InterGastro A/S is a company selling industrial kitchenware to restaurants and cafes across the country, I did all the technical configuration of a business to business webshop, which made sure that the resturant-rep could only order spareparts that fits their current equipment.
Technologies: Linux, Wordpress, MySQL, MySQL Profiler
Software Arkitekt
Novicom A/S
2016-01 - 2024-01
Novicom A/S provide a complete digitial signage solution for customers worldwide. A key-piece of this solution is a small embedded platform running a Linux distribution which I have designed on basis of Ubuntu 20.04 LTS.
Besides from designing the system I also made a build-environment that creates the systems from a plain Ubuntu 20.04 LTS image into a final solution that can be transferede onto a solid state drive and install directly in the hardware before it gets shippet out to the customers, this includes The system contains features such as Network and Wifi management, Remote administration and support, display and audio hardware management, automaticly download, start and display of content from a central server, webinterface accesible from noth the physical display and remote through a webbrowser, and finally the entire system can be upgraded remotely without any kind of user-interaction..
Technologies: Linux, Python, PHP, Bash, MySQL, XOrg, Ansible, KVM/QEMU, Virtualbox, SystemD, Grub, Netplan, WPA Applicant, Wifi, Networking, Over the air updates.
Besides from designing the system I also made a build-environment that creates the systems from a plain Ubuntu 20.04 LTS image into a final solution that can be transferede onto a solid state drive and install directly in the hardware before it gets shippet out to the customers, this includes The system contains features such as Network and Wifi management, Remote administration and support, display and audio hardware management, automaticly download, start and display of content from a central server, webinterface accesible from noth the physical display and remote through a webbrowser, and finally the entire system can be upgraded remotely without any kind of user-interaction..
Technologies: Linux, Python, PHP, Bash, MySQL, XOrg, Ansible, KVM/QEMU, Virtualbox, SystemD, Grub, Netplan, WPA Applicant, Wifi, Networking, Over the air updates.
Senior developper and infrastructure engineer
CDK ApS
2020-01 - 2022-01
Center Denmark ApS is a non-profit company which is founded by a large consortium of danish energy production companies, and our mission is to collect and distribute data about energy production and consumption in Denmark.
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 I was headhunted for this position, and i was met with a large number of systems that without any sense of global structure, built by a bunch of student-workers, with no sense of global direction, security or achitechture, i spent several month sorting that out and establishing a secure and robust baseline.
Herefter i headed the development of several large internal projects and i managed one large international research- and development project.
Technologies: Linux, Python, PHP, Bash, Json, OpenLDAP, Apache Hadoop, MQTT, OPC-UA
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 I was headhunted for this position, and i was met with a large number of systems that without any sense of global structure, built by a bunch of student-workers, with no sense of global direction, security or achitechture, i spent several month sorting that out and establishing a secure and robust baseline.
Herefter i headed the development of several large internal projects and i managed one large international research- and development project.
Technologies: Linux, Python, PHP, Bash, Json, OpenLDAP, Apache Hadoop, MQTT, OPC-UA
Software Architect
Finn Frogne A/S
2019-01 - 2020-01
Finn Frogne are the largest manufacturer of hard- and software for the mobility industry in North Europe, with roots all the way back to the late 70s.
My first assignment was to implement the TOGAF standard in the organisation, followed by a large project where i reverse engineered and documented the securitymodel, application programming interfaces and finally i redesignes those to conform to modern standards and best practices.
Finally i was appointed a coordinating role of the architect team, which in effect was an unofficial team-lead position, i assigned the projects to the individual architects and coordinated followup and feedback while i was the main contact point of the team towards the rest of the company andff external partners.
Teknologies: Linux, Python, PHP, Bash, Json, Rest, GraphQL, Postgresql, Togaf, Git, Phabricator, Centos, Jira.
My first assignment was to implement the TOGAF standard in the organisation, followed by a large project where i reverse engineered and documented the securitymodel, application programming interfaces and finally i redesignes those to conform to modern standards and best practices.
Finally i was appointed a coordinating role of the architect team, which in effect was an unofficial team-lead position, i assigned the projects to the individual architects and coordinated followup and feedback while i was the main contact point of the team towards the rest of the company andff external partners.
Teknologies: Linux, Python, PHP, Bash, Json, Rest, GraphQL, Postgresql, Togaf, Git, Phabricator, Centos, Jira.
DLX A/S
2017-01 - 2019-01
is a danish hosting company for which I have been doing hosting automation, dnssec support for their dns servers and other assignments alike.
Technologies: Bind, PHP, FreeBSD, MySQL
Technologies: Bind, PHP, FreeBSD, MySQL
LincoFood A/S / Baarder Group A/S
2018-01 - 2018-01
is a Danish company who produces equipment and software for poultry processing plants, they have developped a large training platform using Wordpress as one of its main components.
I've helped design and maintain their hosting environment and to optimize and secure the platform itself.
Technologies: Linux, Rsync, Wordpress, MySQL, MySQL Profiler
I've helped design and maintain their hosting environment and to optimize and secure the platform itself.
Technologies: Linux, Rsync, Wordpress, MySQL, MySQL Profiler
City Call Center drift and Booking
2011-01 - 2016-01
we made a booking portal http://www.mipany.dk which handled the booking process for their shared meeting room in the shared office space, besides from that we had the responsibility for the SMS server which their call-center used to inform clients of meetings. We used Wordpress, PHP, Linux and MySQL.
external consultant
Sol.dk / CM Consult A/S
2016-01 - 2016-01
I helped optimizing their hosting-platform, and I provided valuable advise regarding a soon to come upgrade of their entire code-base and hosting platform.
Technologies: Linux, HAProxy, Pound Load Balancer, NFS Kernel server, Citrix Xenserver, SSH Tunneling, Apache2, Drupal, Mysql.
Technologies: Linux, HAProxy, Pound Load Balancer, NFS Kernel server, Citrix Xenserver, SSH Tunneling, Apache2, Drupal, Mysql.
CityWify
2013-01 - 2015-01
I had the responsibility for building the network of this danish Internet Service Provider who provided wifi connectivity in exchange for permission to show advertisements on the users device.
I worked with both routing, network infrastructure, add injections, logging, captive web portal and deployment routines. We used technologies such as squid, Varnish, ISC Dhcp, PHP5 and Python.
I worked with both routing, network infrastructure, add injections, logging, captive web portal and deployment routines. We used technologies such as squid, Varnish, ISC Dhcp, PHP5 and Python.
consultant
KK Electronics
2014-01 - 2015-01
to develop and implement monitoring and alerting on the companies worldwide IT Infrastructure on a lot of different devices ranging from printers and routers to windmills and international fiber-connections. The implemented solution facilitated Linux, Debian, Ubuntu, Nagios, PHP, Python, Visual Basic, Gnokii, MsSQL, Excel, Windows Active Directory,VMWare and redundant Hardware SMS modems.
Mermaid A/S
2015-01 - 2015-01
a company doing digital signage for the comute industry, I had to take over from an engineer who left the company with short notice.
My primary task was developing a realtime positioning system driver for one of the companys Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 bigger clients, Movia A/S, which is the primary provider of public transportation in the Capital area.
Technologies: Embeded Linux, Grub, Xorg, Ubuntu, Git, GPS, GSM, Hardware, Assembly, C#, PHP, Digital Signage,
My primary task was developing a realtime positioning system driver for one of the companys Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08 bigger clients, Movia A/S, which is the primary provider of public transportation in the Capital area.
Technologies: Embeded Linux, Grub, Xorg, Ubuntu, Git, GPS, GSM, Hardware, Assembly, C#, PHP, Digital Signage,
McDonalds Denmark
2014-01 - 2015-01
with McDonalds Denmark I was the lead developer behind their new Country-Wide intranet, used for training, human resourced and quality control.
The solution was developed as a Linux, PHP and MySQL solution on top of Wordpress with a lot of custom code and third party plugins to fit our purpose. The solution received great feedback from upper-local management.
The solution was developed as a Linux, PHP and MySQL solution on top of Wordpress with a lot of custom code and third party plugins to fit our purpose. The solution received great feedback from upper-local management.
Real Estate Agent
Base1
2012-01 - 2014-01
in Copenhagen, we changed the backend from a custom made ASP Classic solution with an access database to a PHP, MySQL and Wordpress based backend, combined with a custom made PHP system for receiving estate postings and displaying them, the system had several different integrations danish realtor systems.
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08
external consultant
NovoZymes A/S
2014-01 - 2014-01
I was appointed to reverse engineer a database and statistics system. The data contained several 100 gigabytes of research results, that had been gathered over the past 10 years. My job was to document the systems, since knowledge of the system had been lost over time, and to upgrade it to modern standards. The system was build with classic PHP4 and MySQL.
Clio Online ApS
2012-01 - 2013-01
for Clio we made a geo-redundant hosting-cluster to handle the daily load from 100.000 concurrent users from all danish ground schools all across the country.
We used the following for the cluster: ●Round Robin DNS ●Several physical servers.
●● independent data centers (DIX Lyngby, InterXion Ballerup) ●Redundant fiber-based network ●Several redundant 1000mbit/s connections.
●Galera MySQL Cluster ●GlusterFS redundant network flesystem ●Ganglia Cluster Monitor in combination with Munin og Nagios.
We outperformed the earlier platform with a factor 5, despite of fever servers and cheaper monthly fees, and the former supplyer was one of the largest danish Typo3 consulting companies.
We used the following for the cluster: ●Round Robin DNS ●Several physical servers.
●● independent data centers (DIX Lyngby, InterXion Ballerup) ●Redundant fiber-based network ●Several redundant 1000mbit/s connections.
●Galera MySQL Cluster ●GlusterFS redundant network flesystem ●Ganglia Cluster Monitor in combination with Munin og Nagios.
We outperformed the earlier platform with a factor 5, despite of fever servers and cheaper monthly fees, and the former supplyer was one of the largest danish Typo3 consulting companies.
Systems administrator
ComX
2009-01 - 2010-01
System administrator with the local Internet Service Provider ComX which was the first danish ISP to provide fiber-to-home. My assignments where monitoring and error handling on Routers, Switches, Asterix, voip, iptv and annalog television.
Lead Developer
Papeer International Aps
2008-01 - 2009-01
as Lead Developer with Papeer I worked primarily with the company database solution that at the time had 50 Gigabytes of data, and over the first year it grew to about 100 Gigabytes.
Besides of that I had the responsibility of the Ukrainian department of developers which we hired to support our danish department.
Primary responsibility was sourounded by PHP Development and Linux Administration.
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08
Besides of that I had the responsibility of the Ukrainian department of developers which we hired to support our danish department.
Primary responsibility was sourounded by PHP Development and Linux Administration.
Mikkel Mikjær Christensen - Hannemanns Allé 12U, 10tv - 2300 København S mikkel@mikjaer.com / +45 41 28 28 08
Surftown A/S
2008-01 - 2008-01
we made the web-part of an online backup service. Payment, recurrent billing, globalization, languages, vat and taxes and integration with backend-systems and the actual backup service.
Academic Background
Bachelors Degree in Innovation and Management
2016-01 - 2019-01
Marketing and Management
Academy Programme
2005-01 - 2008-01
HF High School
HF High School
2002-01 - 2004-01