Recent Posts

You can find a list of all posts in the archive

Centralized Logging Night Class

This week my colleague Joanna and I were running a night class on centralized logging at the elastic meetup Singapore for the first time. We had lots of help of the organizer Alberto who also managed to get a room at his employer Pivotal Labs. Pizza was sponsored by my employer Zenika.

Read more

Elasticsearch and the Languages of Singapore

In June I gave a short talk at the first edition of Voxxed Days Singapore on using Elasticsearch to search the different languages of Singapore. This is a transcript of the talk, a video recording is available as well. We'll first look at some details of the data storage in elasticsearch before we see how it can be used to search the four official languages of Singapore.

Read more

Spring Security and Multiple Filter Chains

Spring Security is an immensely useful technology. It allows you to secure your application without being too intrusive and allows to plug with many different authentication mechanisms. On the other hand it is not that easy to get into and one of those tools that I have to relearn each time I am touching it. In this post I'll describe some of the basics of spring security and how you can use it to secure different parts of your application in different ways.

Read more

Traffic Light Visualizations for Kibana

Kibana 5.3 shipped with an interesting feature that had been anticipated for quite a while. It provides the ability to display the latest value for a certain field using the Top Hit Aggregation. I'll show how to use the Top Hit Aggregation to create two different visualizations.

Read more


I came to Karlsruhe for my studies, started working at synyx and stayed here after switching to working as an independent developer and consultant. For years I helped running the local Java User Group, I am one of the founders of the Search Meetup Karlsruhe and most of my clients are from the area as well. Though my wife and myself liked it here we decided it's time for a change: We'll be relocating to Singapore for at least a year.

Read more