Ewout van Mansom

Programmer and sysadmin. I reverse-engineer products and online games, develop open-source and proprietary software, self-host and maintain own hosting infrastructure.

Professional Experience

November 2017 - March 2018

OSSO B.V. — Site Reliability Engineer

Development and reliability management of application infrastructure for business customers.

  • Reduced response time and system load drastically for an high-traffic website of a client by introducing an HTTP cache (Varnish) into the stack, resulting in more visitor activity on that site.
  • Developed an proof-of-concept advertisement delivery platform optimized for low-end mobile devices.
  • Modernized the internal blog stack by migrating from an old Mezzanine setup to Ghost and Hugo running on a Kubernetes cluster.
June 2017 - November 2017

Peperzaken — Backend Developer

Development of backend services for internal use.

  • Maintained a test suite for data crawling services that gathered subscription information from mobile telecommunications companies in The Netherlands, by reverse-engineering their web portals. Powering the In Control mobile app from Belsimpel.
  • Wrote an data crawler making use of the Scrapy framework for PRADO, used for machine learning training utilized in Verifai’s identity verification technology.
May 2017 (one month) and October 2018 (two weeks)

Codeveloped B.V. — Fullstack Developer

Worked on backend applications.

  • Development and maintenance of a CRM application used by SLIM Personeelsdiensten.
  • Oracle Database-migration of SLIM’s internal CRM system.

Programming skill

  • Java, Kotlin, Scala
  • PHP, Zephir, Hack
  • C, C++, Rust
  • Go
  • JavaScript, TypeScript, CoffeeScript

IT infra know-how

  • RHL, Fedora, Debian, Ubuntu
  • Docker, Kubernetes
  • Ansible, Puppet, Chef
  • Redis, MariaDB/MySQL
  • Varnish, VCL
  • HAProxy, NGINX, Apache

Framework proficiency

  • Django, Flask
  • Phalcon, Laravel, Symfony, Slim
  • Razor

Familiar with

  • QML
  • Lingo, ActionScript

Volunteer Experience & Causes

January 2010 - present

RaGEZONE — Server emulator developer

Development of proprietary, advanced server software that powered a rich, visual and dynamic virtual world with a community of 100K+ young users and 500+ players online at peak hour. Over the span of multiple years I worked closely with a team of other volunteering programmers, content creators and community managers. My areas of work included general game & network programming, database management, reverse engineering, security, artificial intelligence, UX & performance optimization and the overall implementation of new features in our client and server.

July 2017 - present

heeftmijnwebsitehttpsnodig.nl — HTTPS encouragement

I run a dutch website encouraging and informing people why a more secure web is critical, and how to set it up hassle-free. It’s a translation of the English counterpart made by Matt Holt.

March 2017 - present

Bits of Freedom — Local Volunteer

Helping out with local privacy workshops by offering my expertise and always keeping the supply of cookies and range of tea flavours fresh.

August 2015 - present

Jimmy’s Groningen — Peer Supporter

Helping other youth realize their dreams by providing my knowledge, experience, emotional, social or practical help. I also make my avocado sandwiches there.

Other Info

Fluent in Dutch and English, operational proficiency in German, learning Icelandic
Soda top-5:
Club-Mate, Pimento, Caliente, Minor Figures Nitro Cold Brew Black, Matchati Matcha-icetea
Music interests:
I’m a fan of thought-provoking rap songs. Be it German, Dutch or Icelandic. This genre however doesn’t really lend itself for concentration, thus most of the time I listen to electro music.


Please contact me at ewout@freedom.nl for references.