My daily business

I build Web & Mobile Applications

Web Apps

I build modern, extensible and maintainable web applications using technologies like Angular. What makes these web apps so unique is my passion for awesome user interface designs that are optimized for both desktop and mobile devices.

Mobile Apps

I develop mobile apps that look and feel the same on both iOS and Android using Google's cross-platform UI framework Flutter. If you need an app for your organization or have an awesome app idea and want to ship fast, don't wait to get in touch.

Backend Services

I develop backend services with Spring Boot, Quarkus and NestJS (NodeJS) together with Swagger tools for API development and persist data in both SQL and NO-SQL databases. Also, I like to ship these services in containers using Docker.


I can assist with the development of web apps, mobile apps, and backend services, as well as making the right technology and design decisions for your organization. If you need consulting on these matters, do not hesitate to reach out.


Technologies I love working with

About me

Klaus Brandner

Hi, my name is Klaus and I have always been fascinated by web apps and mobile apps that look and feel awesome and are fun to use. I have made it my life's mission to learn and keep learning about state-of-the-art technologies to build such apps with all technical know how to make them work reliable and secure. With my Master's Degree in business informatics I have a good understanding and a steep learning curve when it comes to business processes that should be automated or supported by web apps or mobile apps.

Having had my own side business for five years as a web developer I followed my passion and became a fulltime self-employed web and mobile developer beginning of 2020. Ever since I am involved in various projects to consult and build web apps, mobile apps, backend services, making technology and design decisions.