🚀 Meet our #OracleACE speakers at WeAreDevelopers World Congress 2026! Join @rustam.no and @martinelli.ch in Berlin, July 8–10, as they share their expertise alongside one of the world's biggest gatherings of developers and tech leaders. 🔗 www.wearedevelopers.com/world-congress

…Interessiert sich der US-Präsident doch nicht für Fussball? 🤨 Der Orange interessiert sich nur für sich, alles andere ist nur «geheuchelt», wenn es ihm zu Pass kommt. 🍊🫩 www.srf.ch/news/interna...

The Trump administration inked a $1.6 billion deal for a U.S. company to mine tungsten in Kazakhstan. The company is linked to Trump’s sons & Commerce Secretary Howard Lutnick’s sons, who will be personally enriched by their fathers’ policy decisions. The corruption is breathtaking.

AI can speed up development, but it doesn't replace software engineering. In this webinar, Simon Martinelli shares why devs still need to guide AI to build production-ready apps. 🔗 Watch the full webinar: www.youtube.com/watch?v=IFds...

Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better. - Edgar Dijkstra #quotes #quoteoftheday

Elon Musk spent $290 million getting Trump elected. During this midterm cycle, he's spent $85 million. In total, that’s 0.0375% of his $1 trillion net worth. Oligarchs can rig the system at the expense of everyone else, and only spend pennies doing so. We must get Big Money out of politics.

🧩 Was wäre, wenn nicht mehr der Code die Quelle der Wahrheit wäre? In „Spec-driven Development mit KI“ zeigt @martinelli.ch auf der W-JAX, wie Anforderungen, Diagramme, Modelle, Code & Tests mit KI verbunden werden. 🔗 https://f.mtr.cool/iyvbziutuw #jaxcon #EnterpriseAI

Another implication of Conway's Law is that if we have managers deciding on teams, and deciding which services will be built, by which teams, we implicitly have managers deciding on the system architecture. - Ruth Malan on Conway's Law #quotes #quoteoftheday

Tonight at the @jugbb.bsky.social where @martinelli.ch talks about spec-driven development

Sehr Vieles das aus der SaaS-Produktentwicklung, meistens aus den US, stammt, passt nicht in den Enterprise-Kontext.

I had a great time at Spring Office Hours! We talked about Spec-Driven Development. Thank you @danvega.dev for having me! Watch the short clip here: youtube.com/shorts/ns8C_... And the full session is here: www.youtube.com/live/BZjQo0O... #SpringBoot #SpecDrivenDevelopment #springofficehours

I am happy to share that I have been renewed as an Oracle ACE Pro for 2026/2027! Thank you to the Oracle ACE Program and the whole community. It is an honor to be part of this group again and to keep sharing knowledge about Java, databases, and building real business applications. #OracleACE #Java

Nach dem Vorfall in den Niederlanden denke ich, dass es definitiv Zeit für einen Ausstieg aus Microsoft 365 ist. Ich habe diesen vor zwei Jahren vollzogen und sehr zufrieden und vor dem Willkür der USA geschützt bei @infomaniak.bsky.social www.itmagazine.ch/artikel/8725...

We're going live in one hour! There's still time to join ou webinar: Spec-Driven Development with AI with Simon Martinelli and Miikka Andersson. Join now 👉 pages.vaadin.com/spec-driven-...

⏰ Tomorrow Join Simon Martinelli for a practical look at spec-driven development: an AI workflow where requirements stay central and use cases, diagrams, specs, code and tests all stay connected. Register at 👉 pages.vaadin.com/spec-driven-...

Mehr Engineering, nicht weniger: Das neue Programm der W-JAX 2026 ist da! 🚀 Enterprise AI, Architektur, Security & modernes Software Engineering – wirf jetzt einen ersten Blick ins Programm. 👉 https://f.mtr.cool/iannegfcbr #jaxcon

Good principles to apply when designing complex software from @martinelli.ch Some additional info on the topic from my earlier writings: udidahan.com/2009/09/29/a...

🚀 Save the Date: Spec-Driven Development in der Praxis mit Java Am 18. Juni 2026 bin ich zu Gast bei der Java User Group Hamburg und zeige, wie Spec-Driven Development mit dem AI Unified Process (AIUP) in echten Java-Projekten funktioniert. 🎟️ Anmeldung: www.meetup.com/de-de/jug-ha...

New tutorial online: Build a web app with the AI Unified Process unifiedprocess.ai I published a new step-by-step tutorial for the AI Unified Process: Build a web app from a blank canvas to a tested application. You can find the tutorial here: unifiedprocess.ai/tutorial.html

@martinelli.ch walked me through Spec-Driven Development and the AI Unified Process live. The workflow was flawless. The AI did exactly what it was told. The deployment… we don't talk about the deployment. Full recap: rabauer.dev/en/blog/ai-u...

Next week will be a busy one: two conferences, two talks, and two topics that are very close to my current work. martinelli.ch/appearances/ #SpecDrivenDevelopment #AIUnifiedProcess #SoftwareArchitecture #SelfContainedSystems #AI #SoftwareEngineering

💙 Danke für diese JAX. Danke an alle Teilnehmer, Speaker, Sponsoren, Partner, Aussteller und Teams vor und hinter den Kulissen. Für Eure Energie, Fragen, Gespräche und Momente. 🙌 Nach der JAX ist vor der W-JAX: https://f.mtr.cool/uhballnvbr #jaxcon

I am very happy to share that I will speak at @baselone.bsky.social 2026 on October 15 in Basel. My session: Wenn Spezifikationen den Takt vorgeben #BaselOne #BaselOne2026 #SpecDrivenDevelopment #AIUnifiedProcess #AIUP #SoftwareArchitecture #Java #AI

@infomaniak.bsky.social do you have server issues? My website is down for more than an hour!

We’re building a full Java app live from prompt to production using the AI Unified Process. Spring Boot, @vaadin.com, @jooq.org, Google Login, @fly.io spec driven development, and live architecture decisions with @martinelli.ch Wednesday, 8 PM CEST youtube.com/live/4Fw4Qne... #Java #SpringBoot

“Goodbye microservices, hello self-contained systems” – Session by Simon Martinelli at the JAX 2026 conference in the Rheingoldhalle Mainz @jaxkonferenz.bsky.social

🔗 www.eventbrite.co.uk/e/hands-on-s... 🎟️ 45% off with code: SIMON40 Seats are filling. We’ll be closing registrations soon. #AICoding #SpecDrivenDevelopment #SoftwareEngineering #Developers #CodingWithAI #AItools #FullStackDevelopment #AIEngineering

🎙️Going live at 10am ET on Spring Office Hours. S5E15: Spec Driven Development with Simon Martinelli, Java Champion and Vaadin Champion. If AI is writing the code, the spec should be your source of truth. Bring your questions. https://www.youtube.com/watch?v=BZjQo0OJD_A

🍃 Spec-driven Development: How AI Changed Everything (And Nothing) by @martinelli.ch @ Spring I/O 2026 ▶️ Video: youtu.be/35dH6q18UtI 🔗 Slides: speakerdeck.com/simas/spec-d... 🛠️ Repo: github.com/simasch/aiup... #springio26

In Spec-Driven Development, the spec is the single source of truth. Code is generated from it. Tests are derived from it. Decisions are based on it. Read the full post: martinelli.ch/why-in-spec-... #SpecDrivenDevelopment #AIUP #SoftwareArchitecture #AIinSoftwareDevelopment

I’m happy to announce that I’ll speak at the next CERN Java User Group meetup: CERN JUG Meet-up #5: Lessons from Spec-Driven Development 📅 May 12, 2026 🕕 18:00–19:30 📍 CERN, TH auditorium 🎟️ Registration is open indico.cern.ch/event/168099...

Join the CERN Java User Group for a talk on spec-driven development from the amazing Java Champion, @martinelli.ch . 💬 Lessons from Spec-Driven Development 📅 12 May 2026, 18:00, more details and registration on cern.ch/jug-meetup-5 !

New blog post: How and Why to Trace Use Cases and Tests In my spec-driven development approach, the system use case is the contract. The test proves the contract holds. Read it here: martinelli.ch/how-and-why-... #AIUP #SpecDrivenDevelopment #Java #SoftwareArchitecture #Testing

Last chance to register! Tomorrow is my online workshop: Spec-Driven Development with the AI Unified Process For Java developers and software architects who want to use AI in a more controlled and useful way. Register here: luma.com/busybk3l

The stupidity of this administration is mind blowing.

♠️ The Great International Developer Summit is happening April 21–24! 🌏 Join Oracle ACE @martinelli.ch as he shares his expertise with developers from around the world at one of India’s largest and most exciting tech conferences 🚀💡 🔗 developersummit.com #OracleACE

Did you know that I'll be in Germany, Switzerland, and Austria over the next month? Would love to meet you over coffee, beer, dinner, or a computer screen. Maybe even play a round of my TDD Game? Detailed itinerary is here: ted.dev/where. Don't hesitate to get in touch!

It takes just 30 minutes to reverse-engineer Spring PetClinic with AI into System Use Cases and implement those use cases according to the AI Unified Process: unifiedprocess.ai

New requirements came in for Voluntarix, my volunteer management app. Estimated effort with AI: ~1 hour. Estimated effort without AI: several days. AI didn't just help with the coding. It helped with the conception, too. #AI #SoftwareDevelopment #Productivity

Looking for work. Will DevRel for coffee or wine 😁

In this blog, you will learn some Docker best practices mainly focussed on Java applications. This is not only a theoretical exercise, but you will learn how to apply the best practices to your Dockerfiles. Enjoy! #java #docker

Building pro AI agents is tricky. 🤖🏗️ I’ve got 5 best practices for mastering #AI #Agents, #Subagents, #Skills and #MCP architecture usage. Read my #article at @oboehm.bsky.social foojay.io/today/best-p... Thanks to 😍 @martinelli.ch Alvaro Sanchez M. @supercoco9.bsky.social #AI #LLM #MCP

⏰ Only 2 days left! The J-Spring Call for Papers closes on March 29. Got insights, ideas, or a story worth sharing with the Dutch #Java community? This is your moment. 👉 Submit your talk before it’s too late: sessionize.com/jspring26/ #JSpring #Developers @nljug.bsky.social

A new version of our book "Sustainability for Java Developers - Towards an Understanding of Sustainable Java Software Development" is now available. Jan Ouwens extended Chapter 6 with "Make small Docker images". Get it for free or pay-what-you-want on Leanpub: leanpub.com/sustainabili...

🎤 The #BaselOne2026 Call for Papers is open! Talks & workshops on software engineering, #Java and #SoftwareArchitecture. 📍 Basel 📅 14–15 Oct 2026 ⏰ Deadline: 30 April 2026 Previous speakers include @patbaumgartner.com, @hansolo.eu and Cosima Laube. Submit: sessionize.com/baselone-2026/

Spec-Driven Development is not for developers alone. It is the bridge between business and development. Without business, there are no requirements. Without requirements, there are no specifications. And without specifications, teams may still build software, but not necessarily the right thing.

AI tools for developers are useful. But they are not enough. If AI is getting better and better at programming, why are we focusing almost all innovation on coding tools? Read more here: martinelli.ch/ai-tools-for-developers-are-not-enough/

Practical i18n in Vaadin: Resource Bundles, Locale Handling and UI Language Switching Modern web applications are rarely used only by users with the same language. Even internal tools often reach international teams or are used in different countries. A multilingual user interface is therefore not…