I presented Acompáñame at the Delfín Programme 2026
Temascalcingo, Mexico · GMT−6 · Available for projects
From institutional platforms to WhatsApp bots, mobile apps and hardware. The systems below are answering requests right now for real institutions and businesses — not demos. I run the server they live on myself.
These statuses are real: every domain above responds right now. It all runs on an Ubuntu VPS I administer myself — nginx, certificates, backups and monitoring included.
The short story of how a small problem turns into a system. It is exactly how I work.
Getting into my university meant signing a paper notebook: name, class group, student number, signature, time of day. That was the whole system. I replaced it with a digital ID card carrying a QR code: the student shows it, the officer scans it, and the record is done in seconds.
From there it grew on its own into the platform for the entire school. And once I had the students inside it, a responsibility appeared that was never in the plan: their safety. That is where the SOS button came from — it fires by shaking the phone and alerts authorised staff without showing anything on screen.
Xita · Temascalcingo carnival
A mental-health companion app. Everything the user writes is encrypted and never leaves their phone; risk-signal detection runs on the device itself, so it works even with no signal. This is the project where I learned to build with data that leaves no room for a mistake.
26 screens · React Native · Expo · TypeScript · AES-256
Presented at the Delfín Programme 2026, advised by UAEMéx.
The digital counter for the municipality's water utility: check your bill, pay it, report a leak. Its users arrive on modest phones with limited data, so everything was solved in the fewest taps possible.
odapastemascalcingo.com.mx · live
A psychology clinic that kept its appointments on paper. Today the bot answers on WhatsApp, books, charges, reminds and syncs with Google Calendar — and follows up on its own with anyone who abandoned the conversation, which is exactly where patients were being lost.
GET bienmental.site → {"ok":true,"service":"wa_bot"}
International freight by air, sea and road. A bilingual site, shipment tracking, and a quote form that lands straight in their inbox. Half their clients write in English, and the site serves them just the same.
pakexpress.com.mx · live
The classroom windows were mounted so high nobody could reach them. A motor, an Arduino and a three-button app solved it. Not everything is fixed with a screen — sometimes you have to solder.
Air-conditioning installation and servicing. A business that lives on people writing in, so the page has exactly one job: get them to WhatsApp without friction. A quoting tool, requests that arrive on their own, and local SEO, which is where nearly all of them come from.
aireleon.com.mx · live
My name is David Alvarado Correa. I live in Temascalcingo, Mexico, and I study Administrative and Financial Informatics at the Universidad Mexiquense del Bicentenario. I did not come up through software engineering, and it shows in how I pick problems: I don't start from the technology, I start from something that gets in the way every day.
That's why none of my projects is a classroom exercise. In every one there was someone on the other side waiting for it to work — a neighbour paying a water bill, a patient booking a session, a student walking into class — and that is the only test that counts. I work alone, I answer for it, and I deliver things that keep running.
“What doesn't exist can't break.”
When I got to the programme, I thought I was going to present a project and that would be it. I had no idea I would leave with something much bigger than a poster or a certificate.
There you don't only share your research — you share three weeks with people from all over Mexico who, like you, dared to leave their city, their familiar ground, to show what they had built in front of strangers. You meet people you would never have crossed paths with in everyday life. You live conversations, sunsets, laughter and nerves that don't fit into an academic abstract.
If you are thinking of applying, or you have already been accepted and you have doubts: do it. Don't do it only for the certificate or the line on your CV. Do it because the programme gives you back far more than you bring to it — you will meet people, you will meet yourself in a new setting, and you will probably surprise yourself with what you can live through once you dare to step out of your routine.
“I arrived with a project. I left with an experience I am still processing.”
Go and live it.
— David Alvarado Correa
If your question isn't here, send it by email. I reply the same day.