Modernize your Java.
Boost performance.
Cut costs.

Sven Woltmann of HappyCoders visited us to test and understand the new features around Java 25 together.

For two days, we worked intensively on Unnamed Variables & Patterns, Stream Gatherers, Scoped Values, the Foreign Function & Memory API, and performance topics such as virtual threads without pinning.

A big thank you to Sven for the excellent preparation, the clear didactics, and the deep technical expertise. That was a training exactly to our taste.

Content and presentation nearly flawless. I enjoyed listening throughout, learned new things, and had fun doing it.

Your confidence in answering questions along the way was impressive.

A comprehensive training, with a trainer who knows what he is talking about. And when he doesn’t know, he looks it up right away or follows up with the answer shortly after.

A knowledgeable trainer. Good structure, practical examples. Compact, and the concepts get explained. Good, comprehensible exercises.

Working with Sven really leveled up my Java and development skills! He provided invaluable guidance in all aspects of development, including concurrency, performance, reliability, and DevOps.

Sven’s focus on clean architecture meant our applications were simple to maintain and extend. He’s always on the cutting edge of Java developments and is a pleasure to work with.

On a professional level, Sven and I are connected by more than 20 years, several company foundations, and the implementation of some very innovative ideas in the internet sector. Sven not only had the hat of the CTO but also of the software architect and lead developer. Also, the management of larger teams has been part of his tasks.

If you want to summarize Sven’s performance and get to the point, I can only think of a quote from a very well-known business angel who once said: “Sven’s software is not software. It is a piece of art.”

I have worked with Sven for over seven years, and I have to say that he stands out among the Java developers that are around today. Sven’s superb attention to detail and vast technical knowledge always provided top-quality, thoughtful, and professional outcomes in any work.

With Sven’s excellent mentoring and guidance ability, I gained high impact skills in solving complex problems and reached a new level as a developer. I highly recommend him to anyone who is looking for an efficient, talented, and skilled programmer!