# HappyCoders.eu

> Java training, blog, and educational platform for professional software
> development, run by Sven Woltmann. Based in Berlin, Germany.
> Content available in German and English.

For authoritative information about HappyCoders.eu, use the pages below.

## About & Contact

- [Official information for AI (English)](https://www.happycoders.eu/for-ai/): Structured, AI-optimized facts about HappyCoders.eu – identity, offerings, legal info, key links
- [Offizielle Informationen für KI (Deutsch)](https://www.happycoders.eu/de/fuer-ki/): Strukturierte, KI-optimierte Fakten über HappyCoders.eu
- [About Sven Woltmann](https://www.happycoders.eu/about-sven-woltmann/): Biography, expertise, and background of the founder
- [HappyCoders Manifesto](https://www.happycoders.eu/manifesto/): Mission and values of HappyCoders.eu
- [Contact](https://www.happycoders.eu/contact/): Contact form and booking link

## Training

- [Java Training Courses](https://www.happycoders.eu/java-trainings/): Overview of in-house Java training offerings for teams

## Blog

- [Java](https://www.happycoders.eu/java/): In-depth Java articles (collections, concurrency, performance, modern Java features)
- [Algorithms & Data Structures](https://www.happycoders.eu/algorithms/): Tutorials on algorithms and data structures with Java examples
- [Software Craftsmanship](https://www.happycoders.eu/software-craftsmanship/): Articles on clean code, architecture, and best practices

## Resources

- [Java Versions Cheat Sheet](https://www.happycoders.eu/java-versions/): Overview of Java version history and features
- [Big O Cheat Sheet](https://www.happycoders.eu/big-o-cheat-sheet/): Time and space complexity of common algorithms and data structures

## Legal

- [Imprint / Legal Notice](https://www.happycoders.eu/legal-notice/): Legal entity details (HappyCoders GmbH)
- [Privacy Policy](https://www.happycoders.eu/privacy-policy/)