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we are QLT


QLT Design is one of the oldest web design agencies in The Hague and consists in the core of Gijs van Zijl. Gijs is mainly engaged in realizing websites. In addition, QLT works with a number of programmers. In this way we can create open source websites with unique customization. We share our office space with other specialists. This allows us to offer a very complete range of services. We are as compact or as large as needed, depending on your demand or budget. We attach great importance to a smooth process. Your new website and other communications should fit you like a glove. That is why clients often come to us. To determine together what will work best. Timely adjustments and feedback guarantee an optimal end product.


Online applications
Mobile apps


We design and create responsive websites that are optimized for all devices and browsers. You can also hire us to adjust purchased themes for WordPress or Magento to a desired look.

From: € 640,-

Online applications

In addition to standard programming, you can also contact us for customization. This includes a unique content management system, APIs, Javascripting, CRM systems and other online software.

From: n.v.t.

Mobile apps

We build apps for the platforms iOS (Apple) and Android (Google). If desired, these apps can be made for both smartphones and tablets.

From: € 2000,-


Search engine optimization / SEO is indispensable to make your website easy to find. With this service we offer a baseline measurement, keyword research, website optimization and a weekly SEO report with the state of affairs.

From: € 640,-


Websites, databases, mail or cloud software can be hosted on our servers. We make daily backups, install the desired software and help you with the installation of your e-mail. Webhosing has a minimum term of one year. We have an unlimited fair use policy.

From: € 240,- p/j


When your website is set up with a content management system it is essential that the cms and used plugins / extensions remain up-to-date. New updates and patches ensure that your website remains properly secured. If you do not have the knowledge to do this yourself we can offer you a maintenance contract.

From: € 320,- p/j

We work with:

  • CSS3
  • HTML5
  • Javascript
  • JQuery
  • AngularJS
  • PHP
  • Laravel
  • My SQL
  • Magento
  • MODX
  • WordPress
  • Xcode
  • Java / C++
  • Adobe inDesign
  • Adobe Illustrator
  • Adobe Photoshop
  • Office 365
  • Dropbox
  • WeTransfer
  • Ubuntu