# Markus Eisele (eisele.net)

> Personal site of Markus Eisele (aka myfear): Java Champion, O'Reilly author, and Developer Advocate at IBM in Munich. He helps Java teams build AI-ready, cloud-native systems that are fast to change and boring to operate.

Markus Eisele is a developer, author, architect, and strategist with 20+ years of experience modernizing enterprise Java platforms—from monoliths to Quarkus-based, container-first architectures. His current focus is how Java, open source, and local AI models come together in production systems.

Topics he works on:

- AI-infused Java architectures for enterprise scale
- Java and Quarkus modernization
- Replacing heavy platforms with simpler patterns
- Developer productivity and platform engineering
- Hands-on tutorials engineers can trust

Disclaimer: Markus works at IBM. Content on this site and linked publications reflects his personal views, not official IBM positions.

## Site

- [Homepage](https://www.eisele.net/): About, books, talks, and newsletter signup
- [About](https://www.eisele.net/#about): Background, focus areas, and how to connect
- [Books](https://www.eisele.net/#books): Published O'Reilly books and reports
- [Talks & media](https://www.eisele.net/#talks): Recordings of presentations, webinars, and podcasts

## Writing

- [The Main Thread](https://www.the-main-thread.com/): Substack on Enterprise Java, Quarkus, and AI—deep, hands-on tutorials
- [Blog](https://blog.eisele.net/): Long-running technical blog
- [IBM Developer author page](https://developer.ibm.com/author/markus.eisele/): Articles and content at IBM Developer

## Books

- [AI Agents with Java](https://learning.oreilly.com/library/view/ai-agents-with/0642572245856/): Practical path to designing autonomous JVM systems with scale, reliability, observability, and governance (March 2027)
- [Hilfe, mein Kind hat KI!](https://www.amazon.de/Hilfe-mein-Kind-hat-Familienleben/dp/3689570107/): Der entspannte Eltern-Guide für ein Familienleben mit Künstlicher Intelligenz (October 2026)
- [Enterprise Java Design Patterns in the Cloud Native Era](https://learning.oreilly.com/library/view/enterprise-java-design/0642572328535/): Modernization path for enterprise Java across hybrid environments (April 2026)
- [Applied AI for Enterprise Java](https://www.oreilly.com/library/view/applied-ai-for/9781098174491/): Incorporating AI into Java enterprise applications without unnecessary complexity (November 2025)
- [Modernizing Enterprise Java](https://www.oreilly.com/library/view/modernizing-enterprise-java/9781098102135/): Bringing monolithic Java applications into a cloud-native future (October 2021)

## Talks & video

- [YouTube channel](https://www.youtube.com/c/MarkusEisele): Conference talks, webinars, and interviews
- [Enterprise Integration Is Dead! Long Live AI-Driven Integration](https://www.youtube.com/watch?v=WrBmfaY7IB8): How AI-infused applications and tool-calling agents redefine enterprise integration
- [When all you have is infrastructure, everything looks like a platform to you](https://www.youtube.com/watch?v=K_-9kpu6hUk): Shifting focus from infrastructure to developer-centric platform thinking
- [Die Ringe der Macht](https://www.youtube.com/watch?v=Jm5u_D5j8kM): Uniting Dev, Sec, and Ops through platform engineering (Sparkscon 2024)

## Profiles

- [GitHub](https://github.com/myfear): Open source projects and code
- [LinkedIn](https://www.linkedin.com/in/markuseisele): Professional profile
- [X / Twitter](https://twitter.com/myfear): @myfear
- [Mastodon](https://mastodon.online/@myfear): @myfear
- [O'Reilly author page](https://www.oreilly.com/people/markus-eisele/): Full catalog of published works

## Optional

- [Modern Java EE Design Pattern](https://www.oreilly.com/library/view/modern-java-ee/9781492042266/): Microservice architectures on Java EE (January 2016)
- [Developing Reactive Microservices](https://www.oreilly.com/library/view/developing-reactive-microservices/9781491975640/): Building a complete reactive microservices system in Java (July 2016)
- [KI-Agenten: Warum Unternehmen jetzt handeln müssen](https://www.youtube.com/watch?v=DMbsmrQspgY): German podcast on the business value of autonomous AI agents
- [Quarkus: Learn Once, Use Everywhere](https://www.youtube.com/watch?v=DLfOUk62hxg): Quarkus Summit talk with Adam Bien (December 2021)
- [Modernizing Enterprise Java – GOTO Book Club](https://www.youtube.com/watch?v=tSjCFMSp9oY): Interview about the Modernizing Enterprise Java book
- [Facebook](https://www.facebook.com/eisele.markus): Social profile