My name is Colin Barrett. I am a computer programmer and this is my personal website.

If you’d like to leave a message, you can find me on twitter or linkedin. I also comment on Hacker News.


  • Check out Urho3D (I have been a very occasional contributor). [C++]
  • A clone of Drop7 made using Unity3D. Play it in your browser. [C#]
  • A Windows/MacOS Unity3D plugin for reading audio data from microphones and such. [C++, C#]
  • Some game jam things using LÖVE. [Lua]
  • Messing about with the data files for Jedi Knight. [C]


  • 2019- / Microsoft (Havok) / Dublin, Ireland / Senior Software Engineering Manager
    • Leading the Engineering Operations team to build, test and ship Havok products. [havok powered]
  • 2015-2019 / Microsoft (Havok) / Dublin, Ireland / Senior Software Engineer
    • Windows Mixed Reality shiproom Havok representative/occasional chew toy. [product page, unveil]
  • 2012-2015 / Havok / Dublin, Ireland / Software Developer
  • 2008-2012 / Freelance / Dublin, Ireland / Software Developer
    • Developed OpenGLES renderer for an augmented reality mobile game. [C++, Java, Android] / [press]
    • Implemented cross-platform Lua scripted game engine. [C++, Lua, Windows, Xbox360, PlayStation3] / [product page]
    • Developed cross-platform camera input/image processing plugins for ‘motion controlled’ games. [C++, C#, Unity3D, Adobe Director, Windows, MacOS, iOS, Android] / [client, game, game]
    • Ported several small games from Adobe Director to iOS. [Objective C++, Adobe Director, iOS] / [Defuser review]
  • 2003-2007 / Havok / San Francisco, CA, USA / Senior Devrel Engineer
    • Provided technical support and bespoke feature development for licensees of Havok.
    • Additional responsibilities included hiring, mentoring, support team lead and occasional product release manager duties.
  • 2000-2003 / Havok / Dublin, Ireland / Developer Relations Engineer
    • Provided technical support for licensees of Ipion.
    • Developed cross-platform feature demos for Havok Physics. Represented Havok at developer conferences and trade shows.


  • 1996-2000 / Dublin City University
    • BSc (First class honours) Mathematical Sciences