Eduardo Ferro

Sharing my blog series on Lean Software Development in practice 🚀 Available in both Spanish and English: (Spanish) 👉 eferro.net/p/lean-softwar… (English) 👉 eferro.net/p/lean-softwar… Hope you find it useful! Feedback is always welcome 🙌 #LeanSoftwareDevelopment #XP #Agile

eferro's random stuff: Good talks/podcasts (May I) eferro.net/2026/05/good-t…

Treat your Obsidian vault like a system. rules → scripts → skills AI as execution layer: cleaning, restructuring, evolving. Maintenance becomes cheap → so you can actually do it. eferro.net/2026/04/how-i-… RTs appreciated if it resonates 🙏

Introducing Tolaria! 💧 Today I am releasing a macOS desktop app for managing markdown knowledge bases, and helping both AI and humans operate them. It’s free and open source, and always will be. I have been working on it for three months, and I now use it to run my life and work. I personally have a massive workspace of 10,000 notes — the result of 6 years of Refactoring — which I now operate on Tolaria. Tolaria is the main collaboration surface with my AI agents: they create new notes there, connect them to what exists, and edit existing ones. Everything is easy to understand for them, because it’s just markdown files. In a way, it’s my implementation of @karpathy's LLM wiki. Tolaria is also the biggest experiment I have ever run about writing software with AI: • 2000 commits • 100K+ lines of code • 3000+ tests / 85% coverage • 9.9/10 code health • 70+ architecture decision records I am releasing it open source also to use it as a living artifact of how I do AI coding, so you can inspect at any time things like how I write docs, what's in my AGENTS file, what hooks do I run, and so on. You can find it below: • Newsletter announcement: refactoring.fm/p/introducing-… • Website: tolaria.md • Github repo: github.com/refactoringhq/… Let me know your thoughts!

@domingogallardo pues tengo otros dos posts en draft... sabiendo que aportan les doy un empujón

Vuelvo a mover esto. Es súper interesante para interesados en el tema del segundo cerebro y de cómo procesar notas. Lo que más me gusta es la idea de Eduardo de que todo ha evolucionado de forma progresiva, añadiendo funcionalidades cuando se encuentra problemas y fricciones.

Claude EM: Tu compañero Engineering Manager AI-powered sobre Claude. github.com/jcesarperez/cl… Feedback bienvenido! Ayúdame a mejorarlo

¿Vas a hacer tu bracket de los #NBAPlayoffs? He creado una herramienta para ayudarte. Simula cada serie 10.000 veces, con datos reales👇

New blogpost... I've been taking notes since 2013. Tried many tools. What finally works: markdown on Dropbox + Git + an AI agent that understands my vault's rules. 1,222 notes. Zero vendor lock-in. The most boring stack imaginable. eferro.net/2026/04/my-sec…

eferro's random stuff: Good talks/podcasts (April I) eferro.net/2026/04/good-t…

Con todos los avances que han ido saliendo estos meses, teníamos que darle una vuelta al Workshop de IA para programar. Nos pusimos las pilas con ello, y esta semana lo hemos puesto en práctica con una formación a todos los equipos de @clarityai. Ha salido de lujo y estamos muy contentos de que empresas tan punteras y con un equipo tan top apueste por Codely para darle un empujón a la adopción de IA en la empresa. Adjunto capturas de imagen de la buena gente con la que pudimos disfrutar y sus opiniones del workshop 😊 Muchas gracias a Clarity AI por la confianza y ánimo con elloooooo 🙌

A physicist who spent 30 years studying why massive engineering systems fail realized one terrifying truth: Optimizing anything other than the primary bottleneck is an absolute waste of time. His name is Eliyahu M. Goldratt, the man who famously revolutionized modern operations management. He argued that we obsess over making individual teams faster and completely ignore the actual flow of the system. Here are 4 operational frameworks he used to build elite, hyper-efficient organizations:

Atentos!!

Nuevo post: “El libro que llevo 25 años intentando no escribir” Más que costarme escribirlo, he acabado entendiendo que necesitaba hacerlo. eferro.net/2026/03/el-lib… RTs bienvenidos

Hoy tocaba un pequeño taller de desarrollo con IA para ingenieros :) Os dejo la kata por aquí por si os sirve github.com/jrramon/taller…

I built a production app in 27 days. I wrote 1.7% of the code. 545 commits, 2,236 tests, 97%+ coverage. AI agents did the rest. What changed wasn't the output. It was the job. germandz.com/blog/software-…

Nice! - github.com/eferro/skill-f… - github.com/eferro/skill-f…

I wrote about turning engineering experience into activatable AI skills, bringing discipline (tests that matter, simplicity, incremental delivery) into AI-assisted dev. If it helps someone, great. eferro.net/2026/03/encodi… #AugmentedCoding #IAAssistedCoding #IA

Senior Data Engineers who care about real-world impact: Build the data backbone powering sustainability decisions at global scale. Distributed systems. Large-scale pipelines. Product mindset. Remote. job-boards.eu.greenhouse.io/clarityai/jobs…

DevEx, infrastructure, platform-as-a-product. We’re hiring a Senior Platform Product Engineer to scale how engineers build & ship. Remote / Spain. job-boards.eu.greenhouse.io/clarityai/jobs…

Building GenAI in production > experimenting with prompts. We’re hiring a Senior Staff GenAI Platform Engineer to design and scale our LLM platform. Architecture. Reliability. Agent-based systems. Madrid / Remote. job-boards.eu.greenhouse.io/clarityai/jobs…