Software Engineer in Seville. Backend, offline-first apps, self-hosted infrastructure and free software.https://alvarotc.com/blog/enhttps://alvarotc.com/blog/how-devtools-is-built/https://alvarotc.com/blog/how-devtools-is-built/Svelte islands, one folder per tool, privacy declared in the code and a whole site built by agents running verified plans.Thu, 08 Oct 2026 00:00:00 GMThttps://alvarotc.com/blog/devtools-from-three-tabs-to-one-site/https://alvarotc.com/blog/devtools-from-three-tabs-to-one-site/Why I put the tools I used to hunt for one by one on a single site: Spanish IDs, plates, test data and currencies, in your browser and ad-free.Tue, 06 Oct 2026 00:00:00 GMThttps://alvarotc.com/blog/basecero-your-money-doesnt-have-to-sit-on-someone-elses-server/https://alvarotc.com/blog/basecero-your-money-doesnt-have-to-sit-on-someone-elses-server/Why I built a serverless, accountless, open-source finance app when thousands already exist. What it stands for, the trade-offs, and how to install it.Mon, 07 Sep 2026 00:00:00 GMThttps://alvarotc.com/blog/set-up-a-service-on-your-vps-today-and-move-it-to-your-home-lab-tomorrow-freshrss-with-docker-and-caddy/https://alvarotc.com/blog/set-up-a-service-on-your-vps-today-and-move-it-to-your-home-lab-tomorrow-freshrss-with-docker-and-caddy/Set up a self-hosted RSS reader so migrating it takes just an rsync and a DNS change: subdomain or path, built-in CLI, WebSub, and tested backups.Wed, 02 Sep 2026 00:00:00 GMThttps://alvarotc.com/blog/from-an-idea-to-an-apk-in-24-hours/https://alvarotc.com/blog/from-an-idea-to-an-apk-in-24-hours/Four design documents before writing a line of code. That's how Bito, my FOSS habit-tracking app for Android, went from idea to an APK on my phone.Fri, 14 Aug 2026 00:00:00 GMThttps://alvarotc.com/blog/how-i-set-up-my-vps-with-full-observability-for-less-than-5month/https://alvarotc.com/blog/how-i-set-up-my-vps-with-full-observability-for-less-than-5month/Docker Compose, Caddy, Upptime, Sentry, Firebase Analytics, and Umami. Everything you need to know what's happening in your infrastructure.Thu, 26 Mar 2026 00:00:00 GMThttps://alvarotc.com/blog/new-website-new-direction/https://alvarotc.com/blog/new-website-new-direction/I have rebuilt my personal website from scratch. Here's why, what decisions I made and what comes next.Mon, 16 Feb 2026 00:00:00 GMT