Senior Ruby on Rails Engineer · Rails Modernization Specialist
I take Rails applications that have fallen behind and bring them forward one version at a time, without pausing feature work. 10+ years of production Rails: upgrades from as far back as Rails 2, multi-tenant architecture, background jobs and memory work. Contributor to Ruby on Rails and to the upgrade tooling the community relies on.
I have two handhelds and a folder of games on my laptop. Getting a game from the laptop to a handheld meant shutting the console down, taking the SD card out, putting it in a reader, copying files,...
My blog has been connected to dev.to’s “Publishing to DEV Community from RSS” for a long time. Every post I wrote showed up on dev.to as a draft, which sounds like the whole job done for me. It was...
I wanted Guacamelee! because it is about luchadores. Then I found out the luchador is called Juan Aguacate, which is my name, and wanting it turned into needing it. It is a metroidvania built on l...
I recently migrated MayStore, a multitenant order management app, from 520 lines of custom CSS to maquina-components. This post covers what it takes, what worked well, and a few gotchas. What is...
A developer in Guadalajara opens MDN to look up how fetch handles errors. They read English fine, but after nine hours of work it is the difference between understanding a page and getting through ...
In August the Spanish locale of MDN closed issue #35373: every page under /es/docs/MDN/Writing_guidelines, 60 documents, synchronized with the English source. It took 114 days and 62 merged pull re...
The Starting Point I’ve been running a clinical assistance system for a few years: doctors manage patient consultations, hospitalizations, and referrals across multiple hospital subdomains. The fr...
At OmbuLabs, we’ve been building Claude Code skills for Rails upgrades based on the FastRuby.io methodology. We had three skills working well locally, but distributing them meant telling users to g...
I recently contributed two features to the next_rails gem: parallel CI support for the deprecation tracker and a deprecations merge command to combine the results. This post explains the problem, t...
The Setup I run a clinical assistance system where doctors manage patient consultations, hospitalizations, and referrals. Every one of those records needs a printable PDF: prescriptions, discharge...
My order management app had 187 passing tests. Green suite, clean Rubocop, zero Brakeman warnings. I added system tests and immediately found six bugs. None of them were logic bugs. Every single o...
The Problem My Rails app was running Vite. It worked: HMR in development, fingerprinted assets in production, Tailwind through PostCSS. But Vite is a JavaScript tool that happens to serve a Rails ...
The Problem I run a clinical assistance system where each hospital gets its own subdomain, one.doctors.com, two.doctors.com, and so on. Each hospital has its own doctors, patients, and data. The s...
A few weeks ago I looked at my dotfiles AI configuration and realized I’d over-engineered it. What started as a clean centralization effort had grown into a web of submodules, global MCP servers, a...
Why HAML in the First Place When I started building the clinical assistance app, HAML felt like a breath of fresh air. No closing tags. No angle brackets everywhere. Just clean, indentation-based ...