freelance bureau for digital design

Mobile. Web. UI.

Great design made by simplicity and function

Hey, we are haardtline. UI/UX Designer from Cologne, Germany. Alongside our clients, we are really fascinated in creating just simple and beautiful interfaces – always with function in mind. Therefore we focus on a great user experience, simple and intuitive Usability which people love to interact with.


Find out more

Web Design / UX


In 2013 we designed a new corporate website for prosoft. By an easy and purposeful usability, the entrance to the different services of prosoft has been improved.

Mobile App Design

Stativate App

For the Tech-Startup Quqio we created the user interface design of there mobile app Stativate. The idea behind Stativate is to share any status information simply with others or to follow them. Without typing news or reading long conversations.

E-Commerce Design


Chronext is an online marketplace for extremely high-quality luxury watches. The design should comply to the requirements of the customer. Therefore, our focus for this project was on a highly-remarkable user experience, the easiest usability on any device and absolute SEO conformance.

happy clients

„haardtline has created for us an UI design for our Android App in a very short time and besides has grasped not only our requirements perfectly, but also with a lot of understanding and input for design on mobile devices she reached a 110% result. We thank and are glad about the next upcoming project.“

Mark Heyermann
Quqio (Haftungsbeschränkt)

Case Studies

What we love to do

Our approach is to build better stuff – every day.

Work in Progress 

You can see more of our work on dribbble.

Want to work with us?

Let’s Talk