Hi I'm Sebastian. Freelance IT-Consultant.

I'm a consultant in Germany for the architecture and development of web applications and technical SEO. 
Usually I work with systems based on Neos CMS or TYPO3

My focus is on customizing applications to the processes and needs of the users to increase satisfaction and output of the people working with those systems. This includes a focus on semantic data and usability.

As part of the Neos CMS core team I'm actively involved in improving the system continuously to new requirements of the ever evolving web business.

I would love to hear from you if you need help in your project or need support your team. I work with customers inside and outside of Germany.

Also check out my blog Mind the Seb.  



Learn more about the things I love to do and what I do as consultant.

Group of people working together


Working with people is just more fun and you can achieve things you never could do alone.

That's why I'm part of the team that develops the Open Source CMS Neos. To meet with brilliant people and to build something together that's bigger that what each of us contributes.

I also worked at agencies as Product Owner & Certified Scrum Master with diverse teams of up to 10 members. 

Macbook with code editor


I started developing websites when I was 12 years old. I never stopped. Now my focus is on PHP based Content Management Systems like Neos CMS and the ever changing field of technical SEO.

But what I provide includes usually everything from setting up servers, continuous integration pipelines, integration, front-end development and more. 

Other technologies I worked with include Java, ReactJS, jQuery, Python.

Projects I've been working on

I build and help build websites usually based on TYPO3 CMS or Neos CMS.
Here you can find an incomplete list of my work:


Insurance comparison website for hu Versicherungen.

Based on Neos CMS. One Neos instance and a shared codebase is used here to efficiently manage more than 6 different insurance comparison pages. Performance and SEO is a number one priority which Neos can deliver.

Homepage of Zahnzuversicherung-Direct.de
Homepage of ketterhill.lu


Company website for the ketterthill laboratories group in Luxembourg.

Based on Neos CMS. Includes an advanced search based on ElasticSearch with autocompletion and suggestion engine. Many content types, a laboratory location search and a payment portal for patients make this a great example on how Neos can deliver a great experience for visitors and editors.


Company website for hema electronic GmbH.

Based on TYPO3 CMS.

Currently a relaunch is ongoing based on Neos CMS.

Homepage of hema.de



I always learnt a lot from Open Source projects and I use them all the time in fun & customer projects. So it's good to also involve and give back to the community.

When you work with me you also support those projects as I spent at least 20% of my work time on contributions.


Think of Neos as an Open Source Content Application Platform based on its own PHP framework Flow.

It's used to build websites which allow of customization for editorial processes and delivers a great editor experience through it's inline editing capabilities.

I've been contributing to Neos since 2012 and became a proud core team member in 2015.

Check it out here.

Homepage of the Neos CMS project
Yoast SEO as Neos Backend view

Yoast SEO for Neos CMS

I've been working in several TYPO3 projects with the Yoast SEO for TYPO3 plugin and was really happy with the feedback of our customers.

Therefore I decided to use the Open Source javascript library to build a similar integration for Neos CMS.

Since end of 2018 I have an official partnership with Yoast and they support me providing a great experience to the editors using the package.

Check it out here.


The wookmark plugin for creating masonry style layouts with more than 2500 stars on Github.

I took over as maintainer of this plugin in 2013 from the creator of wookmark.com. Since then I completely reimplemented the plugin twice. First to clean up the codebase for a stable first release. Then again with the dependency to jQuery for version 2.

Check it out here.

Wookmark Javascript Plugin Screenshot

Activities in Open Source communities

I'm also supporting Open Source products by contributing code and taking part in sprints, but also sponsoring.

If you want to support my work check out my Amazon wishlist.

Neos CMS React UI supporter