🚀 New Post: How I Solved SMTP Timeouts with Mailpit and JavaMail I ran into a frustrating issue when testing email sending in a Spring Boot app with Mailpit and Testcontainers — local SMTP connections were hanging for seconds before failing. 👉 martinelli.ch/how-i-solved...

US-Präsident Trump hat bei den weltweiten Zöllen seine Befugnisse überschritten. Zu dem Ergebnis kommt der Oberster Gerichtshof der USA. #Wirtschaft

🚀 New article published: A View Is Not a Table — It Is a Controlled Integration Contract Many people think database views are “just tables.” But when designed intentionally, views are much more: Read it here: martinelli.ch/a-view-is-no...

Amazon just saved nearly $8B on its 2025 tax bill — despite profits hitting $90B — thanks to Trump's Big Ugly Bill. Remember: Amazon spent $75M producing and marketing the Melania movie, while Jeff Bezos gave $1M to Trump's inaugural fund. Quite a return on investment, huh?

I attended Simon's workshop on Vaadin and Karibu Testing a couple of years ago, and I still remember the wow factor when I realized how easily you can have the entire stack in Java, with amazing end-to-end test coverage. Highly recommended stack, especially for enterprise and business applications!

Vaadin has one huge advantage over many other frontend technologies: true browser-less testing. In my article, I show how you can test Vaadin applications without starting a browser, using Karibu-Testing.

I just published a new blog post: Two Flavors of Spec-Driven Development and Why I Clearly Prefer One In the post I explain how the term Spec-Driven Development is used in two very different ways today: martinelli.ch/two-flavors-...

Ijust published a new article on my blog: Why Vaadin and jOOQ are a natural fit for AI driven development martinelli.ch/why-vaadin-a...

An update of our ebook "Sustainability for Java Developers" is now available on @leanpub.bsky.social. @martinelli.ch expanded and restructured “Chapter 3: Impact of Architecture”. Get it from leanpub.com/sustainabili... for free or pay-what-you-want!

Hochschul-IT-Vertreter warnen vor Abhängigkeit von US-Software und verlangen vom Bund kostenlose Lizenzen für die heimische Open-Source-Alternative OpenDesk. #Digitale Souveränität

I'm very proud to be in the top 4! 🚀 www.techtalksweekly.io/p/issue-93

A strong UI component model is one of the biggest productivity multipliers in business application development. Components are not just visuals. They encapsulate state, events, and actions, allowing developers to compose behavior instead of implementing mechanics. martinelli.ch/component-mo...

New 📚 Release! Sustainability for Java Developers: Towards an Understanding of Sustainable Java Software Development by Geertjan, Frank Delporte, et. al. #books #programming #java #softwaredevelopers Find it on Leanpub! Link: leanpub.com/sustainabili...

Team USA freestyle skiers speak out against ICE 🇺🇸🔥 #Olympics

In der Schweiz formiert sich ein hochkarätiges Netzwerk für die digitale Unabhängigkeit. Das ist den USA-Vertretern ein Dorn im Auge. Behörden haben jetzt die Chance, mit gutem Beispiel voranzugehen. gnulinux.ch/digitale-sou... #Medienecho

Proud to introduce the first Foojay book! 'Sustainability for Java Developers' is a collaborative effort from our amazing community. The first edition is now available on @leanpub.bsky.social for FREE with more updates coming soon... foojay.io/today/announ... #Java #Sustainability #FoojayCommunity

New blog post ✍️ Spec-driven development is not a return to waterfall. AI makes coding faster, but speed was never the real problem. The real bottleneck is still requirements and specifications. 👉 Read the post: martinelli.ch/why-spec-dri...

A very nice feature of @jooq.org - implicit joins! No need to explicitly join child tables to retrieve parent's columns. SQL that feels like ORM :)

Want to learn about testing emails with #Testcontainers and #Mailpit? Check out this great piece by @martinelli.ch on Foojay. foojay.io/today/testin... #EmailTesting #Foojay #Java

🎉 #Oracle #AI #Database 26ai Enterprise Edition is now generally available for Linux x86-64 on-prem!

"Spec-driven Development: How AI Changed Everything (And Nothing)" - @martinelli.ch No description on the schedule… which makes me even more curious 😅 AI + specs + reality check? Sounds like a fun combo. 📽️ www.youtube.com/watch?v=yBQI...

The jChampions conference is a free online conference and I'm very excited to talk about Spec-driven Development at this event! jchampionsconf.com

A coworker took this from her apartment. I haven't seen a crowd this size before. Maybe the first Women's March? But it was much much warmer that day. ICE OUT OF MINNESOTA!

📣 New on the blog: The Age of ReDevTest — Why Requirements Matter More Than Code 🧠 AI is reshaping how we build software. 👉 Read the full piece and rethink your workflow: martinelli.ch/the-age-of-r... #ReDevTest #SoftwareDevelopment #AI #RequirementsEngineering #Productivity

JavaOne Speaker Preview with Jeanne Boyarsky @jeanneboyarsky.bsky.social dukescorner.libsyn.com/site/jeanne-...

I wouldn’t call Angular or React and Spring Boot or Quarkus “full-stack”. This is “dual-stack” because you have to learn two languages and two ecosystems.

New on the blog: AI4RE Meets AIUP: Why the IREB Micro-Credential Fits Perfectly 🚀 👉 Read the full post: martinelli.ch/ai4re-meets-... #AI4RE #IREB #AIUP #RequirementsEngineering #SoftwareDevelopment

2 days left to register for our workshop on Spec-Driven Development (SDD). If you’ve found AI coding assistants a bit unpredictable lately, this session is about adding structure to that process. You can register here: www.eventbrite.com/e/hands-on-s...

Spec-Driven-Development mit Simon Martinelli @martinelli.ch und Ralf D. Müller Ralf D. Müller #SoftwareArchitektur im #Stream Aufnahme (Vide / Audio) verfügbar! software-architektur...

New blog post ✍️ Stop starting with code. Start with system use cases. In my projects, system use cases are the center. 👉 martinelli.ch/stop-startin... #SoftwareArchitecture #SpecDrivenDevelopment #AIUP #SoftwareEngineering #Java

New blog post ✍️ AI can generate code fast. But AI cannot guess intent. 👉 Read the blog post: martinelli.ch/why-system-u... #SoftwareArchitecture #AIinSoftware #RequirementsEngineering #SystemUseCases #SpecDrivenDevelopment

Most teams use AI to write code faster. Gartner shows why this rarely leads to real productivity gains. martinelli.ch/why-most-ai-...

Spec-Driven-Development mit Simon Martinelli @martinelli.ch und Ralf D. Müller Ralf D. Müller #SoftwareArchitektur im #Stream Freitag 2026-01-16 13:00 CET Mehr Informationen und Möglichkeit für Fragen: software-architektur...

#SpringAI AskUserQuestionTool - AI agents that ask clarifying questions before answering, gather requirements interactively, and create a specification aligned with your actual needs 📖Blog: spring.io/blog/2026/01... #AI #Java #Agent @spring-ai.bsky.social

Spec-Driven-Development mit Simon Martinelli @martinelli.ch und Ralf D. Müller Ralf D. Müller #SoftwareArchitektur im #Stream MORGEN 13:00 CET Mehr Informationen und Möglichkeit für Fragen: software-architektur...

Many people think software engineers will lose their jobs because of AI. I see it very differently. AI can generate 100% of the code and tests. Like I described in AIUP. That part is done. But software engineering is not coding. Learn more about AIUP and its artifacts at aiup.dev

🚀 New update: AssertJ support in Testcontainers Mailpit I just added AssertJ assertions to my Testcontainers Mailpit project. You can now write fluent assertions instead of low-level checks. 🔗 GitHub: github.com/martinellich... Feedback is welcome 👍

An AI-Ready Architecture for Business Applications martinelli.ch/an-ai-ready-...

The Hidden Performance Killer: Understanding Open Session in View in Spring Boot

The Hidden Performance Killer: Understanding Open Session in View in Spring Boot martinelli.ch/the-hidden-p...

I’m happy to share that I’m in the top 3% of the most active speakers worldwide in 2025, according to Sessionize. A big thank you to all conference organizers, attendees, and the amazing community. Looking forward to many more talks, discussions, and exchanges in the future 🚀

Spec-Driven-Development mit Simon Martinelli @martinelli.ch und Ralf D. Müller Ralf D. Müller #SoftwareArchitektur im #Stream Freitag 2026-01-16 13:00 CET Mehr Informationen und Möglichkeit für Fragen: software-architektur...

Spec-driven Development is not Task-driven AI martinelli.ch/spec-driven-...

Adding manpower to a late software project makes it later. - Fred Brooks #quotes #quoteoftheday

How are you testing e-mail in your Spring Boot App? I use Mailpit and Testcontainers and created an integration. Check it out github.com/martinellich...

Developers today 👇

One Query, Complete Object Graphs: Nested DTOs with jOOQ MULTISET martinelli.ch/one-query-co... by @martinelli.ch

Why User Stories Are a Poor Fit for Spec-Driven Development martinelli.ch/why-user-sto...

This video is still relevant: “AssertJ — Use It Now!” 🚀 If you write Java tests, this one’s for you. Learn how AssertJ can make your assertions cleaner, clearer, and more powerful. Watch now: youtu.be/qn4AMKTPpg8 #Java #Testing #AssertJ #CleanCode #DevTips