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From zero to a RAG system: successes and failures
A few months ago I was tasked with creating an internal tool for the company's engineers: a Chat that used a local LLM. Nothing extraordinary so far…
Andros Fenollosa
Product Owner and Full-stack developer with experience in web technologies. Passionate about functional programming, writing technical books, teaching courses, and maintaining open source projects.
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Visit en.andros.dev → RSS feedOn Hacker News Dec 2025 – Aug 2026
Software Engineering 6Web & Frontend 5Tools & Productivity 2Networking & Internet 2Life, Learning & Writing 1History & Retro Computing 1
2
HTML over WebSockets: real-time SPAs with barely any JavaScript
Building a SPA (Single-page Application) is a complex puzzle: a JavaScript framework that draws the view, an API serving JSON, and 2 independent…
3
I built a GPU back end for Emacs
A few months ago I became obsessed with a silly question: why does my Emacs, on a laptop with a perfectly capable GPU, draw all of its text using the…
4
Doom in Django: testing the limits of LiveView at 600.000 divs/segundo
Based on the latest tests I've published, Django LiveView appears to be the fastest dynamic frontend (I'm sure more variables can be measured). OK…
5
I don't recommend Tailwind CSS
Tailwind CSS is a very popular CSS framework among web developers. With no prior graphic design knowledge, it solves the standardization of spacing…
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Emacs Is a Lispboard
What would have happened if Emacs' default buffer had been a terminal emulator? Conceptually, from the outside, it would be perceived as a terminal…