How can I help you?

Do you need a new website, a webshop or an app? Is your server software up to date and secure against data theft?

From planning to operation

My services cover the entire spectrum from planning and production to the operation of your website.

Conception Production Maintenance


The concept and the definition of the framework conditions are essential in advance and influence your entire future interaction with the website or app.
Complexity is the enemy of security and also the enemy of users and editors. Therefore, we always look for the simplest system for the respective requirements. This also applies to the user interface of the app or the UX/navigation concept of the website. A clear structure facilitates use.


In programming, I draw on over 15 years of experience in developing apps and websites. What I program is tested and works. Related to the technique I offer

  • Frontend programming in HTML5, CSS/SCSS, Bootstrap 4, JavaScript, ES6 and jQuery
  • Backend programming
    • in Java, Java-EE-Stack, Spring, Hibernate
    • in JavaScript, ES6, Node.js, and Electron Apps
    • in PHP, and in this respect expertise in the web systems Redaxo, Wordpress, Craft CMS, Magento and TYPO3
  • Quality control and automated tests of web apps and shop systems, unit tests, test automation with Selenium

Operation and maintenance

In order for your website or app to run stable, it is necessary to regularly update the system. Data loss can be counteracted with a backup concept. With a maintenance contract I can offer you a carefree flatrate for a functional server system that runs stable and always has all important security updates installed.

Customer feedback

"Mr. Haack has a wealth of experience and has solved all my problems. He is very structured, goal-oriented and reliable."
Kornelia Scheerbaum,

"Stefan Haack has extraordinary knowledge in all areas of web development. Concentrated competence paired with reliability and high quality standards."
Sandra Grob, Project Management MTC GmbH

"Excellent implementation of the programming of our new homepage, including the mobile version. Very structured working!"
Christian Zeymer, Managing Director Fuhrberger Zimmerei Betriebsgesellschaft mbH