Modern code. Better performance. More joy in development.
Hands-on trainings on modern Java features, performance, concurrency & more –
as an in-house training at your company or virtually for your team.
From the latest Java version to the Stream API: find the training that gives your team the biggest leap.
These Java courses bring your team up to date – compact and practice-oriented.
from € 4.380,–
from € 4.380,–
from € 4.380,–
For teams catching up on several version jumps at once: These courses combine two or three Java versions in one training – more efficient than booking them separately.
from € 8.330,–
from € 8.330,–
from € 12.170,–
from € 10.260,–
Focused Java education on specific technologies – as a 1- or 2-day training.
from € 2.290,–
from € 2.290,–
from € 4.380,–
from € 6.380,–
All trainings are interactive and hands-on: short theory impulses, followed by practical exercises with examples from real projects. The goal: knowledge that shows up in your code and daily work right away.
During the training, I address your individual challenges. If the group wishes, we go deeper into exactly the topics that really help you in practice.
I flexibly adapt the pace to the group’s level of knowledge. Better to truly understand less material than to superficially tick off a lot – quality over quantity.
Not every training fits every team. Drop me a line about where you stand – which Java version you use and what you’re dealing with. I usually get back to you within one business day. If it makes sense, we’ll clarify in a short video call which course fits your team best.
Request a training for our teamI’ve been working with Java for 30 years – as a developer, CTO, trainer, author, and speaker.
In that time, I’ve helped companies modernize complex Java systems, write performant code, and develop their teams sustainably.
With HappyCoders.eu, I’ve built one of the most widely read Java blogs in the German-speaking world, and I regularly speak at conferences and user groups.
My goal: to teach complex topics in a way that is understandable, practical, and immediately applicable.
I charge per training, not per person – there is no minimum number of participants. An online training costs € 2.290,– for one day, € 6.380,– for three, and € 10.260,– for five days – so the longer the training, the lower the price per day. On-site trainings at your company cost slightly more (one day: € 2.740,–), plus travel expenses; all prices are subject to VAT. You’ll find each course’s price on its card and course page.
Both are possible: I can come to your company for an on-site training – anywhere in Germany, Austria, and Switzerland – or we run the training online, usually via Zoom.
The easiest way is the request form or an email to training@happycoders.eu. Right after submitting, you can book a video call via Calendly, where we discuss the details. You’ll then receive a concrete offer from me.
I recommend a maximum of 12 participants per training – that way I can give everyone individual attention. There is no minimum: I charge per training, not per person.
Yes – shortening topics, weighting them differently, changing the order, or combining content from different courses: I’m happy to adapt the agenda to your team. Since that means reworking the training materials, it involves extra effort – I’ll prepare an individual offer for you.
Yes. All participants receive a certificate of attendance after the training.
My training clients include Hamburger Berater Team GmbH (HBT). You’ll find their feedback and more participant testimonials further down this page – plus independently verified reviews on ProvenExpert.
The trainings on this page are designed for teams. If you’d like to attend as an individual, I offer two courses (held in German) through the training provider ppedv:
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.
Anyone who understands Java can easily follow this trainer. The exercises are well thought out and focused on the essentials.
A good, in-depth overview of all relevant Java features since Java 8, and the opportunity to try all of these features out yourself.
The overall package was very coherent and always tailored to us.
Very practical and good exercise examples.
Quick to respond to questions – a very flexible trainer.
Very good repo with explanations + exercises in one place.
Pace + depth: top-notch.
A very pleasant mix of theory and practice.
A complex topic broken down superbly.
All the important news from Java 9–25 was well explained.
The mix of knowledge, likability, and content was very pleasant.
Just write to me – I usually reply within one business day.
Or book a free video call right away, and we’ll discuss everything important.