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Pelayo Arbués

@pelayoarbues.com
6.7K followers 1.2K following 780 posts

Head of Data Science and AI at idealista.com | Film photographer | Ph.D. in Economics | Sharing my digital garden at pelayoarbues.com | Working full remote from the North of Spain

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Reposted by Pelayo Arbués
Terence Tao @teorth.bsky.social · 11/09/2026
A group of 25 Fields Medalists, including myself, have made a joint declaration on Math and AI: mathandai.org . We welcome additional signatories. See also this article in the Economist announcing the declaration: www.economist.com/science-and-...
mathandai.org
Declaration — Math and AI
Read the declaration and add your name.
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Pelayo Arbués @pelayoarbues.com · 15/09/2026
Abrimos posición en el equipo de datos de idealista/data! Un rol muy de remangarse, hacer nuevas versiones de productos de datos existentes, trabajar con el equipo de negocio, ayudar a migrar a nuevo stack y mucho ELT. www.linkedin.com/jobs/view/44...
linkedin.com
idealista hiring Analytics Engineer in Madrid, Community of Madrid, Spain | LinkedIn
Posted 4:52:15 PM. ¿Quiénes somos?En idealista desarrollamos soluciones de datos de alta calidad que apoyan la toma de…See this and similar jobs on LinkedIn.
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mr. TIM @timkellogg.me · 29/08/2026
what’s your favorite way to have your data? data base data center data mart data warehouse data lake data stream data pipeline data mesh data fabric data swamp data silo data cube data frame data vault data catalog data platform data store data pipe data table data feed data channel data bus
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Obsidian @obsidian.md · 25/08/2026
Save your data to local Markdown files you own forever, and can access completely offline. Obsidian now helps you migrate from all the major proprietary formats including Notion, Evernote, OneNote, Google Keep, Apple Notes, and more.
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Benjamin Riley @benjaminjriley.bsky.social · 20/08/2026
So we know AI helped a negligible number of students. But how many did it harm? I've crunched the raw data provided by the lead researcher, and what I've found is that ~9,500 students using AI studied less than even the *least* studious, non-AI using student. This should shock the conscience.
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Pelayo Arbués @pelayoarbues.com · 06/08/2026
We lost reading. www.pelayoarbues.com/notes/we-los...
pelayoarbues.com
We lost reading
We lost reading. In the advent of GenAI we are all worried about losing the writing. Software developers write less code than ever.
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Reposted by Pelayo Arbués
Google for Developers @developers.google.com · 18/06/2026
Autonomous AI in action. 🤖 Check out how the new Gemma 4 31B model operates as an ADK Agent, exploring, planning, and running experiments on an unfamiliar database to optimize services and maximize revenue. 📈 ✨ Dive into the full session here to explore the complete workflow: goo.gle/4ozP8sK
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Grace Blakeley @graceblakeley.substack.com · 01/06/2026
When people say 'AI isn't a bubble because the technology isn't going away', it just shows they don't know what a bubble is. The internet didn't go away. Railways didn't go away. Tulips didn't go away. An asset can be overvalued, even if its useful.
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Pelayo Arbués @pelayoarbues.com · 28/05/2026
Mamá salgo en @forbes.com! Podeis escuchar/ver el podcast con la entrevista que me hicieron en Open C. forbes.es/brandvoice/9...
forbes.es
Performanze lanza su nuevo podcast con Pelayo González Arbués como primer invitado: «La gente espera magia de la IA, y eso rara vez ocurre» - Forbes España
La consultora tecnológica presenta 'Open C', un espacio de conversación con directivos sobre cómo cambian las decisiones en las empresas con la tecnología presente. En su estreno, el director de Cienc...
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kepano @stephango.com · 18/03/2026
I have been working on Obsidian Reader for over a year. I didn't want to share it until I felt it was good enough. It's finally there. Consistent formatting for any article. Outline, syntax highlighting, nice footnotes, adjustable typography. Runs locally. Just rules, no AI.
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Miss Kitty 🌈🌈🌈 @misskitty.art · 31/01/2026
#StarterPack #Saturday @pelayoarbues.com put it all the way together right here! If you are like #MissKitty pulling levers with #AI #Research, then you want this. If you want to get your two cents in. That is there. Come on and get a #FollowAll and #Repost and listen in or tell it all!
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Pelayo Arbués @pelayoarbues.com · 29/01/2026
When you search for a home, it’s rarely “the whole city.” It’s more like: this neighborhood yes, this one no, that other one too, even if it’s far away. With @idealista.bsky.social new multi-area search, you can mix, exclude and add zones in one map search.
idealista map showing the new feature
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Reposted by Pelayo Arbués
Joe Hanson @drjoehanson.bsky.social · 13/01/2026
I am calling for a complete and total boycott of the Mercator projection in all news stories about Greenland until every member of the American public has seen this
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Pelayo Arbués @pelayoarbues.com · 14/01/2026
The books I read in 2025. I followed the same habit that worked so well in 2024: reading non-fiction first to satisfy my curiosity and then switching to fiction to wind down. This routine is still the best compromise I’ve found between learning and resting. www.pelayoarbues.com/notes/Wrappe...
pelayoarbues.com
2025 Reading Wrapped
In 2025 I kept the pace of reading before bed.
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Pelayo Arbués @pelayoarbues.com · 18/11/2025
I declare myself allergic to self-proclaimed experts. www.pelayoarbues.com/notes/Self-p...
pelayoarbues.com
Self-proclaimed experts
Allergic. I’m allergic to self-proclaimed experts. For me, it’s a red flag.
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Chris Chapman @cchapman.bsky.social · 24/10/2025
Once again I really, really needed this for a better Friday! It is more relevant and hilarious every time I visit. alignmentalignment.ai
alignmentalignment.ai
Center for the Alignment of AI Alignment Centers
We align the aligners
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Pelayo Arbués @pelayoarbues.com · 08/10/2025
Just finished reading 3 Millones de Viviendas by @jorgegalindo.bsky.social. One of the sharpest takes on Spain’s housing crisis I’ve seen. Data, history, and a tough question: what kind of country do we want to build? www.pelayoarbues.com/notes/Tres-M... #realestate
Photography of the book Tres Millones de viviendas displayed on top of orange bricks
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Simon Willison @simonwillison.net · 18/09/2025
I'm ready to accept a definition of "agent" that I think is widely-enough agreed upon to be useful, at least in the AI engineering space: An LLM agent runs tools in a loop to achieve a goal (I've been dismissing the term as hopelessly ambiguous for years) simonwillison.net/2025/Sep/18/...
simonwillison.net
I think “agent” may finally have a widely enough agreed upon definition to be useful jargon now
I’ve noticed something interesting over the past few weeks: I’ve started using the term “agent” in conversations where I don’t feel the need to then define it, roll my eyes …
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Pelayo Arbués @pelayoarbues.com · 23/09/2025
Context engineering is the new AI buzzword. And here we go again: www.pelayoarbues.com/notes/Contex...
A text editor in baroque style, created using magnific.ai
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Yordan Ivanov @ivanovyordan.com · 24/07/2025
The data industry promotes builders. Not leaders. You nailed pipelines. So they gave you politics. Now you're managing people, budgets, and roadmaps. With zero training. You’re not unqualified. You’re just undertrained.
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Chris Plummer @chrisplummer.bsky.social · 24/05/2025
If you load this page it contacts 82 IP addresses executing 256 separate HTTP transactions to download 18MB of data writing 64 cookies to your device to tell you “no”
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Sung Kim @sungkim.bsky.social · 21/05/2025
OpenAI announced Codex (openai.com/index/introd...) on May 16, 2025 for their $200/month Pro users, and Google announced a competing tool called Jules (jules.google) on May 20, 2025 making it available for FREE. There’s no moat in AI—how can a moat disappear in less than a week?
jules.google
Jules - An Asynchronous Coding Agent
Jules is an asynchronous agent that gets out of your way. It lets you focus on the coding you want to do, meawnwhile picking up all the other random tasks that you rather not do.
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Ethan Mollick @emollick.bsky.social · 21/05/2025
Veo 3: "a big broadway musical about garlic bread, with elaborate costumes and a sondheim-like vibe"
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Gergely Orosz @gergely.pragmaticengineer.com · 20/05/2025
Every AI coding tools company doing demos with React + Typescript (and maybe React Native.) Microsoft meanwhile showing off Java and .NET case studies. This doesn’t look like an accident - but a very deliberate strategy. It’s easier to win when you are on a ground with fewer competitors…
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Alejandra Caraballo @esqueer.net · 21/05/2025
VEO 3 Prompt: Generate a TV news anchor with a British accent, the anchor says "in shocking news, Jake Kaye Rowe ling's yacht sank with her on board after being attacked by orcas off the coast of turkey" include the announcement in the dialogue. This took one prompt and 2 minutes to generate.
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Pelayo Arbués @pelayoarbues.com · 20/05/2025
500 days reviewing highlights on @readwise.bsky.social!!!
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Pelayo Arbués @pelayoarbues.com · 20/05/2025
I just shared a learning path guide for software developers looking to infuse AI into their products, tailored specifically to your needs, interests, and how deep you'd like to dive. www.pelayoarbues.com/notes/AI-Lea...
A digital landscape showing gradient descent
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Reposted by Pelayo Arbués
David Gasquez @davidgasquez.com · 14/05/2025
When people are pressured to meet a target value there are three ways they can proceed: 1) They can work to improve the system 2) They can distort the system 3) Or they can distort the data — Donald Wheeler commoncog.com/goodharts-la...
commoncog.com
Goodhart's Law Isn't as Useful as You Might Think
Goodhart's Law is useless. It tells you about a phenomenon, but it doesn't tell you how to solve it. We look at how organisations actually prevent Goodhart's Law, and illustrate this with Amazon's Wee...
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Ethan Mollick @emollick.bsky.social · 14/05/2025
I don't know why people think picking a model on ChatGPT is so complicated.
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luokai @luok.ai · 13/05/2025
SmolVLM real-time camera is a framework for running computer vision models locally on M3 MacBooks. It combines HTML webcam access with llama.cpp's inference process to enable real-time image capture, understanding, and captioning. www.threads.com/@luokai/post...
threads.com
luokai (@luokai) on Threads
SmolVLM real-time camera is a framework for running computer vision models locally on M3 MacBooks. It combines HTML webcam access with llama.cpp's inference process to enable real-time image capture, ...
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Ben Collins @bencollins.bsky.social · 04/05/2025
It is a little weird to me countries aren’t more aggressively, formally trying to take advantage of the U.S. science brain drain. Once in a lifetime opportunity to buy low on Non-Dumbass Americans with PhDs who just wanna look into microscopes and quietly cure ass cancer as our country eats shit.
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Reposted by Pelayo Arbués
José Luis Cañadas Reche @joscani.muestrear-no-es-pecado.es · 04/05/2025
Nuevo post. Área de aplicación. Cosas curiosas que he leído este finde y que me parecen interesantes. Reproduzco parte de un post de Jakub Nowosad muestrear-no-es-pecado.es/2025/05/aoa
muestrear-no-es-pecado.es
Área de Aplicación – Muestrear no es pecado
On this page
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Pelayo Arbués @pelayoarbues.com · 30/04/2025
Just finished 'Power and Prediction'. Loved the economic take: AI dramatically reduces prediction costs but leaves human judgment scarce. Also, great analogy with electricity, real AI impact requires systemic change www.pelayoarbues.com/notes/Power-...
pelayoarbues.com
Power and Prediction
I have recently finished reading Power and Prediction.
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Reposted by Pelayo Arbués
Kees van der Leun @sustainable2050.bsky.social · 28/04/2025
Spain's power is slowly coming back, but situation still far from normal. Out of the 33 GW scheduled for this evening peak, only 18 GW is available. Nuclear and coal-fired power plants still offline.
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Pelayo Arbués @pelayoarbues.com · 12/04/2025
When we don’t know someone well, we tend to project intentions onto them, casting them as a character in a play they themselves are unaware exists.
Evolution from character to person. When we don’t know someone well, we tend to project intentions onto them, casting them as a character in a play they themselves are unaware exists. It’s quite challenging to optimize on behalf of characters in your mental play, but it’s much easier to be understanding of people you know personally. Spending time together learning about each other, often at a team offsite, will slowly transform strangers into people.
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Pelayo Arbués @pelayoarbues.com · 01/04/2025
Why software engineers should learn a bit of data science www.pelayoarbues.com/notes/Why-So... #databs
AI generated image of a bridge linking two lands
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Pelayo Arbués @pelayoarbues.com · 01/04/2025
In simple terms, the purpose of data is to give you a causal model of your business in your head. If reality changes, the figures in your business should show it. At which point you get to update your knowledge.
In simple terms, the purpose of data is to give you a causal model of your business in your head. If reality changes, the figures in your business should show it. At which point you get to update your knowledge.
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Pelayo Arbués @pelayoarbues.com · 25/03/2025
Coaching is no longer a specialty; you cannot be a good manager without being a good coach. The path to success in a fast- moving, highly competitive, technology- driven business world is to form high- performing teams and give them the resources and freedom to do great things.
Coaching is no longer a specialty; you cannot be a good manager without being a good coach. The path to success in a fast- moving, highly competitive, technology- driven business world is to form high- performing teams and give them the resources and freedom to do great things.
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Pelayo Arbués @pelayoarbues.com · 24/03/2025
When leaders take steps to protect their own interests, particularly when those steps are taken at the expense of others, they send a message to everyone else that it is okay to do the same.
When leaders take steps to protect their own interests, particularly when those steps are taken at the expense of others, they send a message to everyone else that it is okay to do the same.
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Pelayo Arbués @pelayoarbues.com · 17/03/2025
To maintain the core of your product there are usually one or two things that have to stay still while everything else spins and changes around them. And that’s a useful constraint. You need some constraints to force you to dig deep and get creative.
To maintain the core of your product there are usually one or two things that have to stay still while everything else spins and changes around them. And that’s a useful constraint. You need some constraints to force you to dig deep and get creative, to push envelopes you hadn’t thought to open before
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Pelayo Arbués @pelayoarbues.com · 15/03/2025
Yes, leadership is about vision. But leadership is equally about creating a climate where the truth is heard and the brutal facts confronted
Yes, leadership is about vision. But leadership is equally about creating a climate where the truth is heard and the brutal facts confronted
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Pelayo Arbués @pelayoarbues.com · 14/03/2025
If people only comply, we can’t expect people to take responsibility for their actions. The chain of command is for orders, not information. Responsibility is not doing as we are told, that’s obedience. Responsibility is doing what is right.
If people only comply, we can’t expect people to take responsibility for their actions. The chain of command is for orders, not information. Responsibility is not doing as we are told, that’s obedience. Responsibility is doing what is right.
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Pelayo Arbués @pelayoarbues.com · 13/03/2025
The push for commercial control of AI capability is dangerous. Naomi Klein, who coined the term “shock doctrine” as “the brutal tactic of using the public’s disorientation following a collective shock… to push through radical pro-corporate measures”
The push for commercial control of AI capability is dangerous. Naomi Klein, who coined the term “shock doctrine” as “the brutal tactic of using the public’s disorientation following a collective shock… to push through radical pro-corporate measures”, is now warning that AI is “likely to become a fearsome tool of further dispossession and despoilation”.
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Sung Kim @sungkim.bsky.social · 12/03/2025
What AI person is saying..... Anthropic CEO, Dario Amodei: In the next 3 to 6 months, AI is writing 90% of the code, and in 12 months, nearly all code may be generated by AI. What AI person is doing..... www.anthropic.com/jobs
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Pelayo Arbués @pelayoarbues.com · 12/03/2025
Having two different pipelines to process your data is a common cause for bugs in ML production. One cause for bugs is when the changes in one pipeline aren’t correctly replicated in the other, leading to two pipelines extracting two different sets of features.
Having two different pipelines to process your data is a common cause for bugs in ML production. One cause for bugs is when the changes in one pipeline aren’t correctly replicated in the other, leading to two pipelines extracting two different sets of features. This is especially common if the two pipelines are maintained by two different teams, such as the ML team maintains the batch pipeline for training while the deployment team maintains the stream pipeline for inference
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Pelayo Arbués @pelayoarbues.com · 09/03/2025
Every three to six months, audit your meetings. Are they useful? Are the right people involved? Do they achieve their purpose, and are they worth the time? Could more be accomplished asynchronously? Consider polling participants or having a neutral person do so.
Every three to six months, audit your meetings. Are they useful? Are the right people involved? Do they achieve their purpose, and are they worth the time? Could more be accomplished asynchronously? Consider polling participants or having a neutral person do so.
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Pelayo Arbués @pelayoarbues.com · 03/03/2025
Not finance. Not strategy. Not technology. It is teamwork that remains the ultimate competitive advantage, both because it is so powerful and so rare.
Not finance. Not strategy. Not technology. It is teamwork that remains the ultimate competitive advantage, both because it is so powerful and so rare.
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Pelayo Arbués @pelayoarbues.com · 03/03/2025
Make sure your candidates know that you’re excited about them. I first encountered this idea reading Rands’s “Wanted” article, 4 and he does an excellent job of covering it there. The remarkable thing is how few companies and teams do this intentionally.
Make sure your candidates know that you’re excited about them. I first encountered this idea reading Rands’s “Wanted” article, 4 and he does an excellent job of covering it there. The remarkable thing is how few companies and teams do this intentionally: in my last interviewing process, three of the companies I spoke with expressed interest exceptionally well, and those three companies ended up being the ones I engaged with seriously.
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Pelayo Arbués @pelayoarbues.com · 24/02/2025
Self-awareness has three components: understanding your underlying value system, identifying your innate preferences—your work style and decision-making tendencies—and being clear about your own skills and capability gaps.
Self-awareness has three components: understanding your underlying value system, identifying your innate preferences—your work style and decision-making tendencies—and being clear about your own skills and capability gaps.
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Pelayo Arbués @pelayoarbues.com · 23/02/2025
To write something, you have to do things, collect ideas, process them, put words on the page, structure them, edit them, rewrite them, and publish them to your site — and that’s all for one article. Then, there’s the emotional challenges: writer’s block, imposter syndrome (...)
To write something, you have to do things, collect ideas, process them, put words on the page, structure them, edit them, rewrite them, and publish them to your site — and that’s all for one article. Then, there’s the emotional challenges: writer’s block, imposter syndrome, lack of time, judgment from strangers, and criticism from friends.
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