Stijn Mathysen, Developer in Essen, Belgium
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Stijn Mathysen

Verified Expert  in Engineering

Software Developer

Location
Essen, Belgium
Toptal Member Since
November 1, 2013

Stijn (pronounced “Stan”) is a pure freelance developer. He mainly develops web and iOS (iPhone, iPad, etc.) applications. He's a devoted Mac user, but his roots lie in Windows. Now and then Stijn develops Win32 and ASP apps as well.

Portfolio

Skylight
PHP, Java, Android, Objective-C, Ruby on Rails (RoR)
Weblogik
Delphi, PHP, Active Server Pages (ASP)
Yooz - Elsevier Training
Delphi, Active Server Pages (ASP)

Experience

Availability

Part-time

Preferred Environment

Ruby on Rails (RoR)

The most amazing...

...thing I've coded was an artificial intelligence engine that you can teach to classify certain objects.

Work Experience

Developer

2008 - PRESENT
Skylight
  • Built and maintaining an online platform for construction workers (twizzi.be) that allows end users to find artisans in an easy way.
  • Spoke at various European conferences (primarily on Rails).
  • Took over multiple existing projects and continued to support and extend them.
  • Created a crowd sourced Translation application (yousource.com).
  • Contributed to various open source projects (own gems, Rails, ...).
  • Created an iPhone, iPad and Android app for one of the biggest consumer retail stores in France.
  • Created a scalable CMS with version based templates.
  • Built a e-learning platform that learns employees to drive economic and eclogic at the same time.
  • Created a web based management platform for geotags with the integration of text, audio and video. The text can be translated, so the end-user can visit the location and read information in his/her own language.
  • Created a contract creation application for a big pharmaceutical company. The application exists of various routes the contracts follow through the company and the end customer. It has customizable templates and allows the company to check claims, made by wholesales (and reduce the amount of invalid claims to 0).
  • Built a Sales Data & Budget Forecast application that eliminated the complex use of multiple Excel files.
  • Built an online platform for artists from over the world to log in. It's Basecamp, with an artistic touch, video chat integration (using OpenTok) with an instant-translation chat functionality.
  • Maintaining the official OpenTok gem on RubyGems.
Technologies: PHP, Java, Android, Objective-C, Ruby on Rails (RoR)

Developer

2002 - 2008
Weblogik
  • Created a competence management system for the army.
  • Built a single instance, molular CMS that supported multiple front-ends.
  • Created "FileSafe", a pre DropBox file sharing platform.
  • Created a competence management system "Compass", that allowed competences from multiple sources (functions, location, ...).
  • Created an online learning system and an offline Content Creation tool.
  • Created a document management system with an approval flow for local governments.
  • Maintained and expanded the CMS of the biggest internet provider in Belgium.
Technologies: Delphi, PHP, Active Server Pages (ASP)

Developer

1999 - 2002
Yooz - Elsevier Training
  • Built a Content Building software that created step-by-step e-learning instructions
  • Created various server application to convert the offline content into online content.
  • Maintained and supported e-learning on a cd-rom based e-learning platform.
  • Implemented existing E-Learning environments (Blackboard, Content Devlivery Platforms, ...) and integrated custom e-learning into it.
  • Created an application to do in-house sound records and attach the sound to the e-learning modules.
Technologies: Delphi, Active Server Pages (ASP)

Twizzi.be

http://twizzi.be
Ruby on Rails application that allows end users to find artisans in an easy way. The application is highly optimized for Google and various caching techniques are applied. A supporting iPhone app was built for the web application.

GiFi Mobile App

Mobile application for GiFi (iOS & Android).

Goesting in Lier

City guide for the city of Lier (Belgium, Dutch only) with beautiful pictures and maps integration.

Alacarte

http://rubygems.org/gems/alacarte
Alacarte is my open source gem for Ruby on Rails that allows you to create menu structures in a domein specific language, like the routes file.

The gem works with other gems like "can can" to prevent menu items showing up for users that don't have the rights to see them.

Frameworks

Ruby on Rails (RoR), Android SDK

Paradigms

Agile Software Development

Other

Content Management Systems (CMS), Caching

Languages

Ruby, Objective-C, Java, Active Server Pages (ASP), Delphi, PHP

Libraries/APIs

ThinkingSphinx, jQuery, Facebook API

Tools

Sublime Text, TextMate, Xcode, Eclipse IDE, Microsoft Access

Platforms

MacOS, iOS, Android, Linux, Ubuntu, Windows

Storage

SQLite, MySQL, Redis, Microsoft SQL Server

1995 - 1997

Bachelor’s Degree in Industrial IT

VTIB - Antwerp, Belgium

1991 - 1994

High School Degree in Industrial IT

VTIB - Antwerp, Belgium

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