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The builders' house, where builders, founders and VCs meet in the heart of Madrid. AI, hardware & robotics, healthtech, digital assets.

Madrid, Spain
Joined July 2026
Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)Photo by mad.builders (@madbuilders_)
mad.builders retweeted
I've changed how I work over the last few weeks. I now have one lead agent for each area of focus, running all the time, and a chief of staff agent that oversees them. Each lead manages its own sub-agents that write code, test it, chase reviews, and coordinate with team members. Everything I need to decide or review comes into one prioritized queue, a simple local web app. Each product review includes screenshots and a video demo of the feature. I clear the queue in batches, mostly by voice and keyboard shortcuts. The leads also bring back ideas I hadn't considered. Working from one queue, instead of switching between dozens of chats, has cut a lot of mental overhead. The system keeps learning my preferences and distilling my judgment into a "Brian brain," so its recommendations and first drafts get better before they reach me. The goal is fewer corrections per change. Every change still goes through the same human review and security checks. It is eliminating tasks, not human judgment. What an exciting time to push the frontier of productivity, especially as we build the economy for agents (agentic finance). We should all keep pushing in this direction.
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mad.builders retweeted
the best hack for founders with several projects is linear tbh a month ago, a messy notion with my tasks today, every project in linear, hooked to claude code thru mcp. i know what to do each morning and im shipping like crazy i was the last one to try it. dont miss it
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mad.builders retweeted
Pizza and programming. Best Friday night😁
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Buenos días! Touching grass ❌ Deploying agents ✅
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mad.builders retweeted
i gave my ai a stupid trip: leave madrid dec 1, three cities in asia in any order, back home by mid december, under 1000€ with viajante it ran 29 flight searches, read 199 offers and planned the whole thing this is how it did it, step by step
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mad.builders retweeted
Claudia meets Klaudia. We're all starting to think, write and even talk alike. Same prompts. Same ideas. Same machines. MACHINE ACCENT my slopore for $CLAUDIA contest Guys, please. Just change the prompt, Give Claudia a day off. Made with @slopcannontv
Announcing a contest! 💸💸 I'll give $420.69 in @XMoney to someone who makes the best Claudia music video by Friday, 10pm EST USA! $69.42 for runner up To make it easy: use the Claudia MCP at claudia.gallery
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Eventos 🔝 en Madrid en noviembre mad.builders/madrid – at Madrid, Spain
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mad.builders retweeted
Durante la @tarugoconf dos chicos se aproximaron a nuestro stand y comentaron: "Buf, otra consultora" antes de marcharse sin decirnos nada. Puedo entender la mala fama debido principalmente a la forma de actuar de ciertas compañías que se catalogan así. Sin embargo, no es justo meternos a todos en el mismo saco. Una buena consultora te puede hacer crecer muchísimo: - Mayor profesionalización y planes de carrera - Mayor exposición a trabajar con distintos clientes - Mayor exposición a distintos tipos de proyectos y tecnologías - En general, mayor estabilidad (vs una empresa de producto que depende de rondas) - Mayor exposición a las últimas innovaciones (a una consultora no le queda otra que estar a la última por pura supervivencia) Y además es posible aportar todo esto con sostenibilidad, con una gran cultura detrás, con compañerismo, con alto rendimiento, con orgullo por el impacto conseguido y con risas por el camino.
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mad.builders retweeted
La próxima Tertulia de @itnig en Madrid me tiene de invitado, con Jordi, Bernat y Marcel. Primero una conversación abierta, luego el pitch de una startup y networking. El 26 de Noviembre, en Mutua Madrileña (Castellana 33). Puertas 18:15, empezamos a las 18:30. Nos lo pasaremos bien, espero que no se pasen con las preguntas, que ya les conocemos!. Entradas aquí: itnig.net/events
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mad.builders retweeted
If you are in #Madrid , maybe try checking out my Madrid Food Recommendation List : proximo.to/p/where-i-eat-in-… (Yes! I designed and developed every tiny detail on the website with Fabien inspired by @kepano . I call it geolocated prose)
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mad.builders retweeted
estamos ayudando a varias startups / scaleups con sus roles más clave salarios hasta 150k para talento AI-pilled > CTO / CPTO hands-on en Madrid para una scale-up con >100M revenue que aspira a ser 1B company. enorme oportunidad para tener impacto internacional y llevar el equipo tech al siguiente nivel > tech lead para una startup series A agentic fintech. equipazo global que busca a un líder que les ayude a montar una organización 100% AI-driven. en remoto desde España > FDEs para un AI lab europeo que está montando su HQ en Madrid. oportunidad para talento que quiera construir productos AI para clientes internacionales de múltiples sectores te encaja o conoces a alguien? pídele a tu agente que aplique a nothiring .me o envíame DM con por qué encajas
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mad.builders retweeted
I just got this gift from a customer well played
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mad.builders retweeted
Ayer nos dieron un premio por el piloto que estamos haciendo con Abaigar. Aunque prefiero celebrar otras cosas (como cuando nos confirmen la continuidad y escalado al resto de obras, o la entrada de nuevos clientes) todo suma y esto demuestra que vamos por buen camino (Abaigar, el cliente, ha empujado mucho para que nos lo diesen y eso es porque están contentos). Por otro lado, aunque creo que a veces es un poco burocrático, reconozco que el trabajo que han hecho desde CEIN con su programa de innovación ha ayudado mucho al cliente a avanzar con este reto, y ha sido todo muy ágil. Hay un buen número de empresas que no tienen autonomía/tiempo para avanzar en innovación y que con cierto impulso, lo consiguen.
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mad.builders retweeted
i made unslop-ui, a skill that removes the small things that make an interface look ai-slop > the tiny uppercase labels above every heading > the 01 02 03 numbering > subtitles that repeat the title > badges and dots that measure nothing > charts with a frame, a grid and a legend nobody needs in the video a landing goes from 31 of those to 0 works with claude code, cursor and codex. 100% open source! (link on the replies)
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mad.builders retweeted
Today, we're taking the first step toward this vision. You can now give AI agents view access to your Tuyo account, and they can take actions after your explicit approval. tuyo.com/ai
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mad.builders retweeted
Mucho tiempo cocinando esto 👨‍🍳. La historia de Glovo en @exp8fellowship . 10 de Noviembre, en las ofis de @THEKER_ai Barcelona 🔥. Gracias @victornavgar y @oscarpierremi por hacerlo posible! Abrimos 30 plazas. Volarán! 👇
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mad.builders retweeted
mushenzhen soon.
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mad.builders retweeted
Santander is scaling AI process automation with Maisa. We’re working alongside Santander’s teams to deploy AI for more complex processes across its main markets in Europe and the Americas, combining reasoning, execution and traceability with specialized models that can run on the bank’s own infrastructure. Our collaboration with Santander reflects our commitment to bringing AI into production at scale in one of the most demanding industries, with governance, reliability, and cost efficiency as core priorities. Read the full story on the @bancosantander website: santander.com/en/stories/san…
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full house in the @mendesaltaren office to learn more about @tastelabs
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