Hi, I'm Tijn Kersjes [tɛin kɛʀʃʏs]

Full-stack coffee lover.

I have studied Computer Science, am a JavaScript enthusiast, and am interested in everything functional and reactive. When not enjoying a good cup of coffee, I like to tinker around with new (web) technologies, and work on tools/workflows that improve developer experience.
Date of birth
7 april 1993
Utrecht, the Netherlands
Utrecht University 2011 – 2015; 2016 – 2017
BSc Computer Science
  • Specialisation: Game Technology
Sintermeerten College 2005 – 2011
Secondary school
  • Orientation: Science and Engineering
  • English language CEFR level C1
Reaktor May 2017 – Current
Software engineer
Konnektid December 2013 – February 2017
Full-stack web developer
  • Employee of the week for 6 consecutive weeks
CreativeCrowds October 2013 – December 2013
iOS application development and testing
Indievelopment January 2012 – May 2015
Organising an annual independent game development conference in the Netherlands
  • Chairman 2013, 2014, 2015
DGDARC January 2012 – December 2014
Board member at the Dutch Game Development And Research Club
  • Chairman April 2013 — June 2014
driezesnul (currently Betawerk) September 2010 – May 2011
Web application research & development
Frameworks & Libraries
Node.js, React, Redux, XNA, Cocoa Touch, SDL
JavaScript (ES6), C#, Objective-C, PHP, Python, Java
Servers & Databases
NGINX, HAProxy, RabbitMQ, Redis, MongoDB, CouchDB, Neo4j
Docker, Ansible, Jenkins, GCloud, AWS
FOSDEM February 2019
GBForth: Using Forth to understand the Game Boy. Video and slides.
AmsterdamJS December 2018
Codemods: Refactoring JavaScript with JavaScript. Video and slides.
Delisp April 2019
A delightful Lisp for JavaScript.
Far From Home January 2019
An experimental game based on latency. Made during the Global Game Jam.
GBForth July 2018
A Forth-based Game Boy development kit.
Brain Teaser June 2006
Educational game, placed second in the Make-a-Game competition.
Personal blog