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Wout Mertens, System Architecture Developer in Warsaw, Poland
Wout Mertens

System Architecture Developer in Warsaw, Poland

Member since December 16, 2014
Wout has over two decades of experience developing for and administering Unix platforms such as Linux, Solaris, and OS X. He excels at programming back-end and front-end services in a variety of languages, and holds a Master's degree in Computer Architecture.
Wout is now available for hire


  • Technicolor Virdata
    AWS, S3, Ubuntu Linux, OpenStack, Django, Chef, Python, Ruby, Cassandra...
  • Cisco
    Solaris, Linux, OS X, VMWare vCenter, C, C++, JavaScript, Java, Perl, SQL...


  • Linux, 20 years
  • C, 20 years
  • Concurrent Programming, 19 years
  • SQL, 16 years
  • System Architecture, 14 years
  • Unix/Linux Virtualization, 11 years
  • JavaScript, 4 years
  • Test-driven Development (TDD), 3 years
Warsaw, Poland



Preferred Environment

OS X, Linux

The most amazing...

...thing I've built is a winning hackathon entry that scrapes government sites for addresses and presents them along with corresponding GPS coordinates.


  • Senior Devops Engineer

    2014 - 2014
    Technicolor Virdata
    • Built orchestration as a component in OpenStack, written in Python with Django. Connected to many servers at once over SSH to control their boot processes.
    • Maintained Chef recipes describing the platform, including writing, refactoring, and release management.
    • Devised a release process and Git branching model for the group.
    • Built and managed a work network, including Linux-based firewall with dual simultaneous uplinks to separate providers.
    • Managed Monit installation and distributed monitoring setup.
    Technologies: AWS, S3, Ubuntu Linux, OpenStack, Django, Chef, Python, Ruby, Cassandra, MongoDB, Kafka, ZooKeeper, Monit, Ganglia
  • Sysadmin, Senior Sysadmin, IT Architect

    2000 - 2013
    • Supported users on 2000+ Solaris workstations worldwide, including creating a variety of tools in shell scripting languages for administration.
    • Built an internal virtualization platform based on Cisco UCS servers, SAN, and VMWare.
    • Created a cross-platform web-based firewall-piercing remote desktop solution based on VMWare and VNC. Developed the first iteration in Perl and the second in Node.js.
    • Built a VNC session manager in Perl that connected to servers over SSH and created virtual desktops with a choice of desktop environment.
    • Built an embedded Linux thin client image allowing cheap PCs with no fans to be used as terminals upon insertion of a USB dongle.
    • Co-wrote a web app allowing concurrent multi-user editing of notes and metadata, based on ShareJS, jQuery, and HTML5/CSS. Extended ShareJS to enable presence notifications.
    • Built tools and an API in CoffeeScript with Promises/A to data-mine a Lithium social platform over REST in a highly parallel manner.
    Technologies: Solaris, Linux, OS X, VMWare vCenter, C, C++, JavaScript, Java, Perl, SQL, NoSQL, AngularJS, jQuery, ShareJS, Socket.IO, WebSockets, MySQL, PostgreSQL, SQLite, CouchDB, Red Hat


  • Hackathon entry (Development)

    This project was a winning entry in the ConnectMedica Hackathon one-day in November 2014, built over the course of one day. It uses Node.js, CoffeeScript, and Promises (Q framework).
    It screen-scrapes a government site for addresses and presents the data together with separately retrieved GPS coordinates over a simple REST API.

  • Nix language syntax highlighting (Development)

    This is a regex-based syntax highlighter that highlights and marks errors in the Nix language (
    It is interesting because regex-based parsers normally only mark single words or operators and cannot enforce a chain of multiple matches.
    Here, nesting is used together with look-forward end conditions to enforce chained matches.

  • libvirt patch (Development)

    This C++ patch enables authentication by connecting to virtualization servers.


  • Languages

    JavaScript, SQL, Bash, CoffeeScript, Perl, C, Python, PHP, Ruby, C++
  • Libraries/APIs

    React, Should.js, jQuery, Q Promises, Backbone.js
  • Tools

    VMware, Nginx, Apache, Mocha, Chef, KVM/Qemu
  • Platforms

    MacOS, WordPress, Red Hat Linux, Ubuntu, Linux, Amazon Web Services (AWS), Docker, OpenStack, Xen, SoftLayer
  • Other

    VMware ESXi, HAProxy, Regular Expressions, NixOS, Full-stack, Cisco, Cisco Engineer, System Architecture, Unix/Linux Virtualization, WebSockets
  • Frameworks

    AngularJS, Ember.js, Ruby on Rails (RoR), Django
  • Paradigms

    Test-driven Development (TDD), Concurrent Programming, Agile Software Development, Functional Programming
  • Storage

    Redis, MongoDB, PostgreSQL, MySQL, Memcached


  • Master's degree in Computer Architecture
    1994 - 2000
    Ghent University - Ghent, Belgium
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