About us
# Claude Code Barcelona 🤖✨ (Spanish version below)
Welcome to the Claude Code Barcelona community — a space for developers, builders, and AI enthusiasts in Barcelona who want to get the most out of Claude Code.
Whether you're just getting started or already using Claude Code in your daily workflow, this group is for you. Our goal is simple: learn together, share what works, and build a strong local network around one of the most exciting AI coding tools out there.
What we're about:
- 💡 Sharing best practices, tips & tricks for using Claude Code effectively
- 🔗 Building a support network where we help each other grow
- 🧠 Learning from each other's real-world experiences and use cases
- 🚀 Exploring the cutting edge of AI-assisted development
We're just getting started — and we need YOU.
This community is being built from the ground up, and there are many ways to get involved:
🎤 Want to speak? Have a workflow, project, or insight that you want to share? We'd love to have you as a speaker at one of our future events.
🛠️ Want to help organize? Passionate about community building? Join us behind the scenes and help shape what this group becomes.
🏢 Want to sponsor? If your company wants to support Barcelona's growing AI dev community, we'd love to explore hosting events together.
Join us and help build something great. The best communities are made by the people in them — so let's make this one count. 🎉
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🇪🇸 Español
Bienvenido/a a la comunidad Claude Code Barcelona — un espacio para desarrolladores, builders y entusiastas de la IA en Barcelona que quieren sacarle el máximo partido a Claude Code.
Tanto si estás empezando como si ya usas Claude Code en tu día a día, este grupo es para ti. Nuestro objetivo es sencillo: aprender juntos, compartir lo que funciona y construir una red local sólida alrededor de una de las herramientas de programación con IA más potentes del momento.
De qué va esto:
- 💡 Compartir buenas prácticas, trucos y consejos para usar Claude Code de forma efectiva
- 🔗 Crear una red de apoyo donde nos ayudemos mutuamente a crecer
- 🧠 Aprender de las experiencias reales y casos de uso de cada uno
- 🚀 Explorar la vanguardia del desarrollo asistido por IA
Acabamos de empezar — y te necesitamos.
Esta comunidad se está construyendo desde cero, y hay muchas formas de participar:
🎤 ¿Quieres dar una charla? ¿Tienes un flujo de trabajo, proyecto o aprendizaje que quieras compartir? Nos encantaría tenerte como ponente en uno de nuestros próximos eventos.
🛠️ ¿Quieres ayudar a organizar? ¿Te apasiona construir comunidad? Únete al equipo y ayuda a dar forma a lo que este grupo puede llegar a ser.
🏢 ¿Quieres ser sponsor? Si tu empresa quiere apoyar a la creciente comunidad de desarrollo con IA en Barcelona, nos encantaría explorar cómo organizar eventos juntos.
Únete y ayúdanos a construir algo grande. Las mejores comunidades las hacen las personas que las forman — hagamos que esta valga la pena. 🎉
Upcoming events
1
July Edition
Runroom, Carrer de Santa Eulàlia, 5-9, 3ª planta, Gràcia, 08012, Barcelona, ES🎉Our holidays welcome event is here!
We’re glad to announce our next Claude Code Barcelona meetup! Don’t miss these two talks plus a great networking session, all thanks to our new host Runroom!
⚠️ Spots are limited. We recommend reserving your spot as soon as possible. If you’re unable to attend, please let us know in advance so we can release your seat.
📅 Jul 8th | Doors open at 6:00 PM, kick off at 6:15 PM
📍 Carrer de Santa Eulàlia, 5-9, 3ª planta, Gràcia, 08012 BarcelonaAgenda
➡️ 6:15 PM — Check-in
🏢 6:30 PM — Host company presentation
🎤 6:40 PM — Code is cheap. Now what? by Chris Ford, in English
🎤 7:20 PM — The parrot is eating the harness: how LLMs are being trained and what it means for your AI applications by Gabriel Mesquida, in English
🤝 8:00 PM — Networking***
🎙️Talks
Code is Cheap: Now what? (In English)
Coding agents like Claude Code make a big difference to how individual developers do their job. Some activities, in particular those relating to making code, are a whole lot faster.
Coding agents also make a big difference to how we run engineering organisations, because they have traditionally been shaped by the constraint that code was very expensive to produce. Examples of how organisation-level processes change include how we treat legacy code, how we design architecture and how we decide whether to buy something off-the-shelf or build it ourselves.
The changing economics of software will reshape the context within which every software developer works. If you understand these dynamics, you have a better chance to take advantage of the opportunities.
By Chris Ford, Technology Director at Thoughtworks. He's the author of the upcoming O'Reilly book 'Agentic Engineering at Scale', which is all about getting value from coding agents beyond developers' personal productivity.
The parrot is eating the harness: how LLMs are being trained and what it means for your AI applications (In English)
In this presentation we will review what LLMs are and how they have been evolving. From the initial transformers to the latest evolution trained with Reinforcement Learning and with more efficient latent attentions. At some point, they needed to be incorporated into a wider, integrated system to make them useful, managed by code.
And that’s when harnesses were born: crewAI, strands, openclaw and also our beloved Claude Code. They all have something in common: they ride the parrot so that the LLM does what we want, in the way that we want, adding instructions, identity, guardrails, memory, persistence. Include in the list of harnesses any AI application that your startup, or your company is building on top of an LLM. But, where did harnesses come from and what do they do?
Now for the main premise: training by Reinforcement Learning is so powerful that, in the last few months LLMs have been evolving incorporating functions that harnesses used to do for them. What has happened exactly and what does this mean for us, AI developers and AI entrepreneurs?
By Gabriel Mesquida, course facilitator and teaching assistant at Stanford Engineering Center for Global & Online Education
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We’d like to thank our sponsor, Runroom 🙌, for providing the space, snacks, and drinks! 🍕🧃Don't miss it! 🎉
----120 attendees
Past events
4
