Markus Eisele
@myfear.com
Developer, turned to consulting, developer relations, sales, and landed in marketing.
Writing books for #Oreilly.
Into Java, Kubernetes and such.
Legal called to tell you that I'm not officially speaking for IBM.
Writing books for #Oreilly.
Into Java, Kubernetes and such.
Legal called to tell you that I'm not officially speaking for IBM.
A complete Quarkus tutorial that builds a global event orchestrator — Quartz scheduling, WebSockets, PostgreSQL Dev Services, and a live 3D globe to visualize deliveries.
If you want to level up your time-zone aware scheduling in Java, this one’s for you.
🔗 buff.ly/ZM4r2tn
#Java #Quarkus #Backend
If you want to level up your time-zone aware scheduling in Java, this one’s for you.
🔗 buff.ly/ZM4r2tn
#Java #Quarkus #Backend
December 31, 2025 at 7:15 AM
A complete Quarkus tutorial that builds a global event orchestrator — Quartz scheduling, WebSockets, PostgreSQL Dev Services, and a live 3D globe to visualize deliveries.
If you want to level up your time-zone aware scheduling in Java, this one’s for you.
🔗 buff.ly/ZM4r2tn
#Java #Quarkus #Backend
If you want to level up your time-zone aware scheduling in Java, this one’s for you.
🔗 buff.ly/ZM4r2tn
#Java #Quarkus #Backend
AI isn't just a feature anymore. It's your infrastructure. And it has a massive attack surface.
From prompt injection to model poisoning, are you actually ready to secure your LLM integrations?
ICYMI: A guide to the new security reality for Java developers.
🔗 buff.ly/0Yl77jk
#AI #Java #InfoSec
From prompt injection to model poisoning, are you actually ready to secure your LLM integrations?
ICYMI: A guide to the new security reality for Java developers.
🔗 buff.ly/0Yl77jk
#AI #Java #InfoSec
December 30, 2025 at 11:00 AM
AI isn't just a feature anymore. It's your infrastructure. And it has a massive attack surface.
From prompt injection to model poisoning, are you actually ready to secure your LLM integrations?
ICYMI: A guide to the new security reality for Java developers.
🔗 buff.ly/0Yl77jk
#AI #Java #InfoSec
From prompt injection to model poisoning, are you actually ready to secure your LLM integrations?
ICYMI: A guide to the new security reality for Java developers.
🔗 buff.ly/0Yl77jk
#AI #Java #InfoSec
Java + scripting vibes?
JBang makes it real.
I wrote a hands-on walkthrough showing how to build real tools in a single Java file—CLI apps, API callers, even tiny Quarkus services.
Fast, fun, and surprisingly powerful.
Read it here:
buff.ly/5ozu1Zl
#Java #JBang #Coding #DX #Quarkus
JBang makes it real.
I wrote a hands-on walkthrough showing how to build real tools in a single Java file—CLI apps, API callers, even tiny Quarkus services.
Fast, fun, and surprisingly powerful.
Read it here:
buff.ly/5ozu1Zl
#Java #JBang #Coding #DX #Quarkus
December 30, 2025 at 7:15 AM
Struggling with the Spring -> Quarkus jump? You don't need a total rewrite.
I broke down the 10 essential bridge extensions that let you keep your existing knowledge while gaining that sweet startup speed.
🚀 If you missed this guide, grab it now: buff.ly/L6PZV12
#Java #Quarkus #SpringBoot #Legacy
I broke down the 10 essential bridge extensions that let you keep your existing knowledge while gaining that sweet startup speed.
🚀 If you missed this guide, grab it now: buff.ly/L6PZV12
#Java #Quarkus #SpringBoot #Legacy
December 29, 2025 at 2:39 PM
Struggling with the Spring -> Quarkus jump? You don't need a total rewrite.
I broke down the 10 essential bridge extensions that let you keep your existing knowledge while gaining that sweet startup speed.
🚀 If you missed this guide, grab it now: buff.ly/L6PZV12
#Java #Quarkus #SpringBoot #Legacy
I broke down the 10 essential bridge extensions that let you keep your existing knowledge while gaining that sweet startup speed.
🚀 If you missed this guide, grab it now: buff.ly/L6PZV12
#Java #Quarkus #SpringBoot #Legacy
New hands-on guide that shows how to use Virtual Threads in #Quarkus for REST, messaging, and real-world I/O workloads. Clean code. Massive scalability. No reactive overhead.
- @RunOnVirtualThread
- Parallel execution
- Messaging consumers
- Production considerations
buff.ly/gWU6upg
#Java
- @RunOnVirtualThread
- Parallel execution
- Messaging consumers
- Production considerations
buff.ly/gWU6upg
#Java
December 29, 2025 at 7:15 AM
New hands-on guide that shows how to use Virtual Threads in #Quarkus for REST, messaging, and real-world I/O workloads. Clean code. Massive scalability. No reactive overhead.
- @RunOnVirtualThread
- Parallel execution
- Messaging consumers
- Production considerations
buff.ly/gWU6upg
#Java
- @RunOnVirtualThread
- Parallel execution
- Messaging consumers
- Production considerations
buff.ly/gWU6upg
#Java
The conversations I’ve had this year with Java devs learning Quarkus were remarkably similar.
Different people. Same 10 questions.
And once those questions are answered… Quarkus finally clicks.
I turned all those hallway chats + community threads into one guide:
👉 buff.ly/K8E4hkF
#Quarkus #Java
Different people. Same 10 questions.
And once those questions are answered… Quarkus finally clicks.
I turned all those hallway chats + community threads into one guide:
👉 buff.ly/K8E4hkF
#Quarkus #Java
December 28, 2025 at 7:15 AM
The conversations I’ve had this year with Java devs learning Quarkus were remarkably similar.
Different people. Same 10 questions.
And once those questions are answered… Quarkus finally clicks.
I turned all those hallway chats + community threads into one guide:
👉 buff.ly/K8E4hkF
#Quarkus #Java
Different people. Same 10 questions.
And once those questions are answered… Quarkus finally clicks.
I turned all those hallway chats + community threads into one guide:
👉 buff.ly/K8E4hkF
#Quarkus #Java
Event Sourcing finally explained in a way Java devs will appreciate.
Records, sealed types, pure folds, #CQRS, projections… all implemented in #Quarkus with real code you can copy and run.
If you're curious how to build clean, data-oriented architectures, here you go:
buff.ly/zpTZdi7
#Java
Records, sealed types, pure folds, #CQRS, projections… all implemented in #Quarkus with real code you can copy and run.
If you're curious how to build clean, data-oriented architectures, here you go:
buff.ly/zpTZdi7
#Java
December 27, 2025 at 7:15 AM
Event Sourcing finally explained in a way Java devs will appreciate.
Records, sealed types, pure folds, #CQRS, projections… all implemented in #Quarkus with real code you can copy and run.
If you're curious how to build clean, data-oriented architectures, here you go:
buff.ly/zpTZdi7
#Java
Records, sealed types, pure folds, #CQRS, projections… all implemented in #Quarkus with real code you can copy and run.
If you're curious how to build clean, data-oriented architectures, here you go:
buff.ly/zpTZdi7
#Java
Ever wondered how conference speaker cards get made?
For jChampions 2026, I automated the whole thing.
Full tutorial + code walkthrough:
buff.ly/dzk2C3I
#Java #Quarkus #DevTools #jChampions
For jChampions 2026, I automated the whole thing.
Full tutorial + code walkthrough:
buff.ly/dzk2C3I
#Java #Quarkus #DevTools #jChampions
December 26, 2025 at 7:15 AM
Ever wondered how conference speaker cards get made?
For jChampions 2026, I automated the whole thing.
Full tutorial + code walkthrough:
buff.ly/dzk2C3I
#Java #Quarkus #DevTools #jChampions
For jChampions 2026, I automated the whole thing.
Full tutorial + code walkthrough:
buff.ly/dzk2C3I
#Java #Quarkus #DevTools #jChampions
Build your first reactive messaging app with Quarkus.
I turned a classic “order → kitchen → notification” workflow into a fully reactive pipeline with channels, stream completion, and message transformation. No Kafka needed. Pure Quarkus.
buff.ly/46p0hKI
#Java #Quarkus #ReactiveMessaging
I turned a classic “order → kitchen → notification” workflow into a fully reactive pipeline with channels, stream completion, and message transformation. No Kafka needed. Pure Quarkus.
buff.ly/46p0hKI
#Java #Quarkus #ReactiveMessaging
December 25, 2025 at 7:15 AM
Build your first reactive messaging app with Quarkus.
I turned a classic “order → kitchen → notification” workflow into a fully reactive pipeline with channels, stream completion, and message transformation. No Kafka needed. Pure Quarkus.
buff.ly/46p0hKI
#Java #Quarkus #ReactiveMessaging
I turned a classic “order → kitchen → notification” workflow into a fully reactive pipeline with channels, stream completion, and message transformation. No Kafka needed. Pure Quarkus.
buff.ly/46p0hKI
#Java #Quarkus #ReactiveMessaging
Build a Festive Java CLI with Quarkus: The Multifaith Santa-CLI Holiday Tutorial buff.ly/u8YRUjj
December 24, 2025 at 11:15 AM
Build a Festive Java CLI with Quarkus: The Multifaith Santa-CLI Holiday Tutorial buff.ly/u8YRUjj
The last working day before Christmas is not when I want to think about email wording.
This post shows a tiny Java app that generates out-of-office replies using a local Ollama model.
buff.ly/zFBuiao
#Java #LocalAI #SoftwareArchitecture
This post shows a tiny Java app that generates out-of-office replies using a local Ollama model.
buff.ly/zFBuiao
#Java #LocalAI #SoftwareArchitecture
December 23, 2025 at 7:15 AM
The last working day before Christmas is not when I want to think about email wording.
This post shows a tiny Java app that generates out-of-office replies using a local Ollama model.
buff.ly/zFBuiao
#Java #LocalAI #SoftwareArchitecture
This post shows a tiny Java app that generates out-of-office replies using a local Ollama model.
buff.ly/zFBuiao
#Java #LocalAI #SoftwareArchitecture
Looking for a fun December project?
I built a Secret Santa API with Quarkus and turned it into a full tutorial.
REST API → Wishlists → Pairings → Email Notifications → PostgreSQL via Dev Services.
A festive way to learn modern Quarkus patterns.
buff.ly/Xi2x8Vj
#Java #Quarkus #BackendDev #APIs
I built a Secret Santa API with Quarkus and turned it into a full tutorial.
REST API → Wishlists → Pairings → Email Notifications → PostgreSQL via Dev Services.
A festive way to learn modern Quarkus patterns.
buff.ly/Xi2x8Vj
#Java #Quarkus #BackendDev #APIs
December 22, 2025 at 7:15 AM
Looking for a fun December project?
I built a Secret Santa API with Quarkus and turned it into a full tutorial.
REST API → Wishlists → Pairings → Email Notifications → PostgreSQL via Dev Services.
A festive way to learn modern Quarkus patterns.
buff.ly/Xi2x8Vj
#Java #Quarkus #BackendDev #APIs
I built a Secret Santa API with Quarkus and turned it into a full tutorial.
REST API → Wishlists → Pairings → Email Notifications → PostgreSQL via Dev Services.
A festive way to learn modern Quarkus patterns.
buff.ly/Xi2x8Vj
#Java #Quarkus #BackendDev #APIs
Time for the weekly blue pill.
Happy fourth advent y’all.
Happy fourth advent y’all.
December 21, 2025 at 8:14 AM
Time for the weekly blue pill.
Happy fourth advent y’all.
Happy fourth advent y’all.
Kubernetes for Java Developers: The Ultimate Quarkus + Minikube Quick Reference buff.ly/W8zhWCk
December 21, 2025 at 7:15 AM
Kubernetes for Java Developers: The Ultimate Quarkus + Minikube Quick Reference buff.ly/W8zhWCk
AI doesn’t magically fix legacy Java systems. It makes good thinking more powerful + bad thinking much more expensive.
I go through Dex Horthy’s ideas with a Java lens:
• context engineering
• architectural drift
• modernization without regressions
• keeping system intent explicit
buff.ly/OLhKq3q
I go through Dex Horthy’s ideas with a Java lens:
• context engineering
• architectural drift
• modernization without regressions
• keeping system intent explicit
buff.ly/OLhKq3q
December 20, 2025 at 7:15 AM
AI doesn’t magically fix legacy Java systems. It makes good thinking more powerful + bad thinking much more expensive.
I go through Dex Horthy’s ideas with a Java lens:
• context engineering
• architectural drift
• modernization without regressions
• keeping system intent explicit
buff.ly/OLhKq3q
I go through Dex Horthy’s ideas with a Java lens:
• context engineering
• architectural drift
• modernization without regressions
• keeping system intent explicit
buff.ly/OLhKq3q
If you’ve ever wanted to simulate SaaS-style subdomains on localhost without touching DNS, this one is for you.
The article covers:
• Tenant routing via subdomains
• JAX-RS filters
• Request-scoped TenantContext
• Zero DNS config
Check it out 👇
buff.ly/ddKuyyK
#Java #Quarkus #SaaS #nipio
The article covers:
• Tenant routing via subdomains
• JAX-RS filters
• Request-scoped TenantContext
• Zero DNS config
Check it out 👇
buff.ly/ddKuyyK
#Java #Quarkus #SaaS #nipio
December 19, 2025 at 7:15 AM
If you’ve ever wanted to simulate SaaS-style subdomains on localhost without touching DNS, this one is for you.
The article covers:
• Tenant routing via subdomains
• JAX-RS filters
• Request-scoped TenantContext
• Zero DNS config
Check it out 👇
buff.ly/ddKuyyK
#Java #Quarkus #SaaS #nipio
The article covers:
• Tenant routing via subdomains
• JAX-RS filters
• Request-scoped TenantContext
• Zero DNS config
Check it out 👇
buff.ly/ddKuyyK
#Java #Quarkus #SaaS #nipio
Quarkus + PostgreSQL = native full-text search (with ranking + snippets) — no Elasticsearch required.
In the tutorial we:
• Create a generated tsvector column
• Run ranked queries via Hibernate Panache
• Build a Qute search UI
👉 buff.ly/ZR5sAwd
#Java #Quarkus #Postgres #FullTextSearch
In the tutorial we:
• Create a generated tsvector column
• Run ranked queries via Hibernate Panache
• Build a Qute search UI
👉 buff.ly/ZR5sAwd
#Java #Quarkus #Postgres #FullTextSearch
December 18, 2025 at 7:15 AM
Quarkus + PostgreSQL = native full-text search (with ranking + snippets) — no Elasticsearch required.
In the tutorial we:
• Create a generated tsvector column
• Run ranked queries via Hibernate Panache
• Build a Qute search UI
👉 buff.ly/ZR5sAwd
#Java #Quarkus #Postgres #FullTextSearch
In the tutorial we:
• Create a generated tsvector column
• Run ranked queries via Hibernate Panache
• Build a Qute search UI
👉 buff.ly/ZR5sAwd
#Java #Quarkus #Postgres #FullTextSearch
Build Beautiful Java Dashboards with Quarkus and IBM Carbon Design System buff.ly/hZy7sjv
December 17, 2025 at 7:15 AM
Build Beautiful Java Dashboards with Quarkus and IBM Carbon Design System buff.ly/hZy7sjv
I built a Christmas Card Generator in Java using Quarkus Renarde—HTML/CSS rendered as PNG on the backend.
Surprisingly fun… and actually useful.
Read the full guide:
buff.ly/tx2LVBR
#Java #Quarkus #Coding
Surprisingly fun… and actually useful.
Read the full guide:
buff.ly/tx2LVBR
#Java #Quarkus #Coding
December 16, 2025 at 7:15 AM
I built a Christmas Card Generator in Java using Quarkus Renarde—HTML/CSS rendered as PNG on the backend.
Surprisingly fun… and actually useful.
Read the full guide:
buff.ly/tx2LVBR
#Java #Quarkus #Coding
Surprisingly fun… and actually useful.
Read the full guide:
buff.ly/tx2LVBR
#Java #Quarkus #Coding
Ever wondered how Quarkus builds its Dev UI?
It’s Vaadin under the hood — and it’s actually great for building your own apps too.
I wrote a full hands-on tutorial showing how to build a clean task manager UI using #Vaadin Flow + #Quarkus, all in pure #Java. Zero JavaScript drama.
buff.ly/fcMQX9x
It’s Vaadin under the hood — and it’s actually great for building your own apps too.
I wrote a full hands-on tutorial showing how to build a clean task manager UI using #Vaadin Flow + #Quarkus, all in pure #Java. Zero JavaScript drama.
buff.ly/fcMQX9x
December 16, 2025 at 7:15 AM
Ever wondered how Quarkus builds its Dev UI?
It’s Vaadin under the hood — and it’s actually great for building your own apps too.
I wrote a full hands-on tutorial showing how to build a clean task manager UI using #Vaadin Flow + #Quarkus, all in pure #Java. Zero JavaScript drama.
buff.ly/fcMQX9x
It’s Vaadin under the hood — and it’s actually great for building your own apps too.
I wrote a full hands-on tutorial showing how to build a clean task manager UI using #Vaadin Flow + #Quarkus, all in pure #Java. Zero JavaScript drama.
buff.ly/fcMQX9x
New article on The Main Thread!
I built a full NFL game prediction engine using Java, Quarkus, PostgreSQL, and Tribuo — all running in one clean microservice.
If you want to see how modern Java handles real ML workflows, this one’s for you.
👉 buff.ly/Glrx9Sa
I built a full NFL game prediction engine using Java, Quarkus, PostgreSQL, and Tribuo — all running in one clean microservice.
If you want to see how modern Java handles real ML workflows, this one’s for you.
👉 buff.ly/Glrx9Sa
December 15, 2025 at 7:15 AM
New article on The Main Thread!
I built a full NFL game prediction engine using Java, Quarkus, PostgreSQL, and Tribuo — all running in one clean microservice.
If you want to see how modern Java handles real ML workflows, this one’s for you.
👉 buff.ly/Glrx9Sa
I built a full NFL game prediction engine using Java, Quarkus, PostgreSQL, and Tribuo — all running in one clean microservice.
If you want to see how modern Java handles real ML workflows, this one’s for you.
👉 buff.ly/Glrx9Sa
🎄 New festive Quarkus tutorial!
I built a full Wishlist app using Hibernate ORM 7 soft deletes, Quarkus, and PostgreSQL Dev Services.
Learn soft-delete strategies, restoration, cascading behavior, and build a small Qute UI along the way.
Check it out:
buff.ly/84nReYz
I built a full Wishlist app using Hibernate ORM 7 soft deletes, Quarkus, and PostgreSQL Dev Services.
Learn soft-delete strategies, restoration, cascading behavior, and build a small Qute UI along the way.
Check it out:
buff.ly/84nReYz
December 12, 2025 at 7:15 AM
🎄 New festive Quarkus tutorial!
I built a full Wishlist app using Hibernate ORM 7 soft deletes, Quarkus, and PostgreSQL Dev Services.
Learn soft-delete strategies, restoration, cascading behavior, and build a small Qute UI along the way.
Check it out:
buff.ly/84nReYz
I built a full Wishlist app using Hibernate ORM 7 soft deletes, Quarkus, and PostgreSQL Dev Services.
Learn soft-delete strategies, restoration, cascading behavior, and build a small Qute UI along the way.
Check it out:
buff.ly/84nReYz
The Shapeshifter API: Zero-DTO Polymorphism with Quarkus and Jackson Views buff.ly/AEQZE4j
December 11, 2025 at 7:15 AM
The Shapeshifter API: Zero-DTO Polymorphism with Quarkus and Jackson Views buff.ly/AEQZE4j