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Yannick Grenzinger

@yannick.grenzinger.com
417 followers 328 following 641 posts

Product engineer & manager. Engineering Manager @ Payfit. Father of triplets. Love #psychology, #UX, #product, #DDD and software development in general.

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Reposted by Yannick Grenzinger
The Conversation U.S. @us.theconversation.com · 01/08/2026
Pope Leo is drawing on a 95-year-old Catholic principle called ‘subsidiarity’ to argue that AI should be governed by the people most affected by it, not concentrated in the hands of a few powerful corporations. theconversation.com/the-catholic...
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Yannick Grenzinger @yannick.grenzinger.com · 01/08/2026
pivot-to-ai.com/2026/07/30/g...
pivot-to-ai.com
Google kills AlphaFold — so much for AI curing cancer
AlphaFold was a machine learning system from Google Deepmind. It did protein folding. It was usably good at guessing protein structures. It caught public attention by doing really well in the Criti…
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Reposted by Yannick Grenzinger
Nahel Belgherze @wxnb.bsky.social · 31/07/2026
Bordeaux, France, has now recorded more days above 40°C in 2026 alone than during the entire 105-year period from 1920 (when observations began) to 2025. This is deeply shocking.
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Yannick Grenzinger @yannick.grenzinger.com · 27/07/2026
French firefighters face 'pyrocumulonimbus' for first time www.france24.com/en/live-news...
france24.com
French firefighters face 'pyrocumulonimbus' for first time
The gigantic wildfire ravaging southwest France has created an extremely dangerous "pyrocumulonimbus" -- a phenomenon never before seen in the country -- the spokesman for the country's National Firef...
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Yannick Grenzinger @yannick.grenzinger.com · 22/07/2026
Why firing your teams when you can fire your CEO ? overpaid.lol
overpaid.lol
OverpAId — Fire Your CEO. Hire The Future.
OverpAId is the AI Executive Platform that replaces your nine-figure leadership team with something that actually works. (Satire.)
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Yannick Grenzinger @yannick.grenzinger.com · 13/07/2026
The Graph That Should Be Front-Page News www.lyrebirddreaming.com/post/the-gra...
lyrebirddreaming.com
The Graph That Should Be Front-Page News
Every so often the Earth produces a signal that is impossible to ignore. This graph is one of them. It shows sea-surface temperatures in the Niño 3.4 region of the equatorial Pacific, one of the most ...
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Reposted by Yannick Grenzinger
Leanpub @leanpub.bsky.social · 04/07/2026
Organisational Dysfunctions: Open Systems Theory Explains by Trond Hjorteland is a new release on Leanpub! Most organisations are trying to fix the wrong things. This book names the dysfunctions they keep running into and explains, through Open … leanpub.com/organisation...
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Reposted by Yannick Grenzinger
Pierre Beyssac @pierreb.bsky.social · 15/06/2026
Des nouvelles du parti qui milite contre : - le datacenter du Bourget - le datacenter de Fouju (CampusIA) - les datacenters de Marseille - j'en passe et des meilleurs Bref, qui s'oppose à peu près à tout datacenter significatif.
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Charity Majors @charity.wtf · 15/06/2026
I think AI is the best opening we've ever had to bring our engineering values to the mainstream, instead of the top single-digit-percent of teams it's always been. But nondeterminism will take more engineering discipline. Not less. charitydotwtf.substack.com/p/ai-demands...
charitydotwtf.substack.com
AI demands more engineering discipline. Not less
If you lived through the shift from handcrafted server pets to immutable infrastructure, you should sense something oddly familiar about what's happening now.
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Yannick Grenzinger @yannick.grenzinger.com · 15/06/2026
LFI n'est pas pro-russe mais n'a aucun soucis avec les dictatures et haï les États Unis et "l'occident"
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Yannick Grenzinger @yannick.grenzinger.com · 11/06/2026
À lire !
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Reposted by Yannick Grenzinger
Isidore Poireau @isidorepoireau.bsky.social · 08/06/2026
Quant à la procureure d’Auch, nommément accusée par le ministre, elle n’a cessé d’alerter sa hiérarchie depuis 2023 : avec ses dix magistrats, elle a 10 000 dossiers à traiter. Réplique de Darmanin : «Ce tribunal ne manque pas de moyens particulièrement» www.politis.fr/articles/202...
politis.fr
Affaire Lyhanna : le pire de la politique
Face à la tragédie, Gérald Darmanin et Emmanuel Macron se sont empressés d’accabler les magistrats pour mieux échapper à la remise en cause de leur politique.
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Yannick Grenzinger @yannick.grenzinger.com · 07/06/2026
Just don't read things that no human has written 😉
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Reposted by Yannick Grenzinger
Mickaël 🇪🇺 🇫🇷 @mickaelvieira.com · 30/05/2026
Ce article du Grand Continent sur les techniques de désinformation est fascinant. legrandcontinent.eu/fr/2026/05/1...
legrandcontinent.eu
L’Ukraine se bat contre un ennemi que nous ne comprenons pas encore | Le Grand Continent
À Kiev et sur le front de la guerre narrative, une enquête exclusive sur le système du « Cygne d’acier ».
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Yannick Grenzinger @yannick.grenzinger.com · 23/05/2026
@nmartignole.bsky.social bonjour Nicolas, sur Flowcon, on a travaillé sur un chat et rag autour de toutes les confs qu'on a enregistrée. Je me dit que ca pourrait intéresser Devoxx. Contactes moi si tu veux en parler 🙂
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Yannick Grenzinger @yannick.grenzinger.com · 23/05/2026
👋 j'espère que vous allez bien en ces temps de canicules. Pour info, je co-organise Flowcon France et nous avons besoin de vous pour envisager le futur de la conférence. Message long mis sur LinkedIn : www.linkedin.com/feed/update/...
linkedin.com
FlowCon France — vos attentes pour la prochaine édition | FlowCon France
FlowCon est une conférence organisée avec passion par un petit groupe de bénévoles. Dans le contexte actuel, son avenir reste incertain, et c’est pour cette raison que nous avons besoin de vous. Votr...
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Yannick Grenzinger @yannick.grenzinger.com · 13/05/2026
Je vibe code depuis mon tel. Je suis un AI native staff engineer total.
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Reposted by Yannick Grenzinger
Devoxx France @devoxx.fr · 12/05/2026
Les 232 vidéos de #DevoxxFrance 2026 sont en ligne ! 🤯 • 135 Conférences • 49 Tools in Action • 30 Lunch Talks • 12 Deep Dive • 6 Keynotes Abonnez-vous à notre chaîne YouTube ici : www.youtube.com/@DevoxxFRvid... Notez les dates de la prochaine édition : 𝟳, 𝟴 & 𝟵 𝗮𝘃𝗿𝗶𝗹 𝟮𝟬𝟮𝟳 ✅
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Arnaud @pankzsoft.net · 12/05/2026
Le meetup Software Crafters Nantes fêtera ses dix ans le 16 juin 2026 avec un événement spécial : 3 talks autour du craft par 3 oratrices de talent. Inscrivez vous ➡️ mobilizon.fr/events/a9e3d... Partage apprécié !
mobilizon.fr
Software Crafters Nantes a 10 ans!
16 juin 2026, 19:00:00 - GMT+02:00 - 14 Rue François Evellin, 44000, Nantes, France - Pour fêter les 10 ans de la communauté Software Crafters Nantes, nous avons le plaisir de vous proposer une sessio...
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Yannick Grenzinger @yannick.grenzinger.com · 27/04/2026
Everything that went is wrong with Claude. clawd.rip I think it's really the wrong strategy to bet on Claude Code
clawd.rip
Everything That Went Wrong With Claude
A satirical timeline of Claude and Anthropic controversies, outages, bans, legal disputes, policy fights, and quality complaints.
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Yannick Grenzinger @yannick.grenzinger.com · 22/04/2026
Dans le train en direction de Devoxx, pour 2 jours ! Au plaisir de vous y croiser :)
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Reposted by Yannick Grenzinger
Nicolas Beaussart @beaussan.io · 29/03/2026
Thanks a lot React Paris for having me! It was a great conference, with amazing folks joining! Also, thank you everyone that gave me amazing feedback on my talk! I'm glad it resonated with soo many of you! Here are the slides if you missed it! beaussan.io/talks/2026/r...
Slide about caching efficiency on ciGroup photo of react parisFinal slide of my talk
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Yannick Grenzinger @yannick.grenzinger.com · 12/03/2026
"After nearly 30 years, JavaScript finally has a modern datetime API." bloomberg.github.io/js-blog/post... // maybe JS will start to be a serious ecosystem :D
bloomberg.github.io
Temporal: The 9-Year Journey to Fix Time in JavaScript
JavaScript's Date object has been a source of bugs for three decades. Temporal, which just reached Stage 4, is a modern replacement with immutable types, first-class time zone and calendar support...
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Reposted by Yannick Grenzinger
Paris Marx @parismarx.com · 15/02/2026
OpenAI ”acknowledged in its own research that LLMs will always produce hallucinations due to fundamental mathematical constraints that cannot be solved through better engineering, marking a significant admission from one of the AI industry’s leading companies.” You can’t trust chatbots.
computerworld.com
OpenAI admits AI hallucinations are mathematically inevitable, not just engineering flaws
In a landmark study, OpenAI researchers reveal that large language models will always produce plausible but false outputs, even with perfect data, due to fundamental statistical and computational limi...
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Yannick Grenzinger @yannick.grenzinger.com · 03/01/2026
Appropriate song www.youtube.com/watch?v=4aIY...
youtube.com
WWIII
YouTube video by KMFDM - Topic
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Yannick Grenzinger @yannick.grenzinger.com · 01/01/2026
@devoxx.fr quand j'essaie de créer mon compte sur le site du CFP, je me prends une 400 bad request sans plus de détail :( Si vous avez une piste :)
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Yannick Grenzinger @yannick.grenzinger.com · 01/01/2026
Bonne année !
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Julien@Kindrobot @kindrobot.bsky.social · 30/12/2025
J'ai décidé aujourd'hui d'utiliser l'intelligence artificielle générative en tant qu'assistant. Un "assistant de pêche à la ligne" pour être précis. Et comme ce sont des machines qui aiment calculer des suites statistiques de mots, on va lui donner ce qu'elle attend et ce pour quoi elle est douée.
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Katharine the Geek (Lesbian Bitch) @katharinethegeek.bsky.social · 21/12/2025
Reading is thinking, and afterwards, writing is thinking. Doing an "AI" summary eliminates thinking in both steps. A doc told me some of her colleagues are using "AI" to write their case notes. Her take: oh hell no, because writing the case notes is when you think about the case.
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Yannick Grenzinger @yannick.grenzinger.com · 18/11/2025
Le gap entre les délires que Claude Code me fait avec Sonnet 4.5 et les takes éclatés au sol que je lis ou entends (ex: un prompt ... AI engineer peut remplacer toute une équipe) me confirme que la majorité de notre industrie n'a aucune idée de ce que c'est de faire un logiciel facile à maintenir.
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Yannick Grenzinger @yannick.grenzinger.com · 17/11/2025
Donc MrPhi fait une comparaison erronné entre un ensemble hétérogène d'êtres humains et un LLM et ça va passer crême ... Comme quoi son take down virulent de Luc Julia s'analyse surtout à son émotion et ses biais sur les LLMs. Voir les 8ères minutes ici : www.youtube.com/watch?v=nqFl...
youtube.com
L'autonomie des IA expliquée aux humains
YouTube video by Monsieur Phi
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Reposted by Yannick Grenzinger
John Cutler @johncutle.fish · 16/11/2025
Reductionism can be wrong, but actionable. Complexity can be right, but paralyzing. cutlefish.substack.com/p/tbm-389-ov...
cutlefish.substack.com
TBM 389: Overthinker!
From a young age, being accused of “overcomplicating” or “overthinking” things felt like a dismissal of who I was.
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Yannick Grenzinger @yannick.grenzinger.com · 11/11/2025
The gap between AI vendor (or tech influencer or devrel) that sell you that you can now just be an AI manager doing the work for you ... And the unmaintanable code that AI mostly generate is really interesting and tells us a lot why software cost so much at the end ...
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Yannick Grenzinger @yannick.grenzinger.com · 07/11/2025
I think I am a simple man I love to build system that just works
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Yannick Grenzinger @yannick.grenzinger.com · 07/11/2025
If you booted up a super-smart AI in ancient Greece, fed it all human knowledge, and asked it how to land on the moon, it would respond “You can’t land on the moon. The moon is a god floating in the sky.” How would you get it to realize the moon is actually a big rock?
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Yannick Grenzinger @yannick.grenzinger.com · 06/11/2025
Why aren't smart people happier? www.theseedsofscience.pub/p/why-arent-...
theseedsofscience.pub
Why aren't smart people happier?
Author: Adam Mastroianni
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Yannick Grenzinger @yannick.grenzinger.com · 06/11/2025
I am really bored listening to Conway's law quote. It's like saying again and again that water is wet at some point. The next question is now: why the software boat keeps sinking ?
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Yannick Grenzinger @yannick.grenzinger.com · 30/10/2025
China is the future in so many ways
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Dare Obasanjo @carnage4life.bsky.social · 30/10/2025
China has passed a new law mandating that anyone creating social media content on sensitive topics like medicine, law, education or finance must hold formal qualifications such as a college degree in those fields. Imagine an internet where people actually had to know what they were talking about.
livemint.com
China tightens the screws: Influencers now need degrees to speak on finance, health, law | Today News
China has rolled out a new law requiring influencers to prove their qualifications before posting about topics like finance, health or law. While officials call it a fight against misinformation, crit...
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Yannick Grenzinger @yannick.grenzinger.com · 29/10/2025
The Psychology Of Trust In AI: A Guide To Measuring And Designing For User Confidence www.smashingmagazine.com/2025/09/psyc...
smashingmagazine.com
The Psychology Of Trust In AI: A Guide To Measuring And Designing For User Confidence — Smashing Magazine
With digital products moving to incorporate generative and agentic AI at an increasingly frequent rate, trust has become the invisible user interface. When it works, interactions feel seamless. When i...
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Yannick Grenzinger @yannick.grenzinger.com · 28/10/2025
"The idea is that ChatGPT will be your agent, but in reality you are ChatGPT's agent" www.anildash.com//2025/10/22/...
anildash.com
ChatGPT's Atlas: The Browser That's Anti-Web - Anil Dash
A blog about making culture. Since 1999.
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Katie Mack @astrokatie.com · 19/06/2025
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
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Gergely Orosz @gergely.pragmaticengineer.com · 17/10/2025
From the same dev: “it’s also that I cannot see management being concerned solving the information visibility that keeps slowing us down. We’re rolling out AI coding tools for devs but no one thinks about the org silos that slow us down 10x more than any coding use case.”
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Yannick Grenzinger @yannick.grenzinger.com · 24/08/2025
The LLM and agentic coding revolution allows anyone to start anything. But... It doesn't fix (so far) to maintain on the long term this explosion of codebase and lines of code
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World Bollard Association™️ @worldbollardassoc.bsky.social · 23/08/2025
Robot meets bollard. Nothing beats the #WorldBollardAssociation
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Yannick Grenzinger @yannick.grenzinger.com · 18/08/2025
"Don’t treat LLM coding agents as highly capable superintelligent systems. Treat them as lazy, intoxicated robots" lnkd.in/eJQhMqVF But fortunately, some have the solution: humans will review the thousands of lines of code generated by LLMs. /s
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Yannick Grenzinger @yannick.grenzinger.com · 17/08/2025
"If you learn one thing, learn that shipping is all that matters. If you learn two things, learn that inspiring people is the best way to ship" thechrisperry.substack.com/p/being-a-go...
thechrisperry.substack.com
Being a good PM at Google
Things I've learned over 12 years building products you love
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Yannick Grenzinger @yannick.grenzinger.com · 31/07/2025
About Vibe Coding and Tool being better than Agent, a must listen conf to separate good usage of LLMs vs the hype www.youtube.com/watch?v=1WC8...
youtube.com
The Role of the Human Brain in Programming
YouTube video by Val Town
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Yannick Grenzinger @yannick.grenzinger.com · 21/06/2025
À quoi sert la Gen AI
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Jason Gorman @jasongorman.bsky.social · 14/06/2025
The reason you don't have time to write unit tests is because you didn't write unit tests.
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