Raúl Contreras Herrera

I build AI systems that run in production — and I teach people to build them, in a room, in Tijuana.

Clases presenciales · Tijuana

Enseño a construir la cosa, en un salón.

Mi formación es en psicología educativa. Por eso el salón está armado como está: grupos chicos, todos escribiendo código, y nadie mirando a alguien más hacerlo.

Curso de Phaser 3 — ocho sesiones, grupo fijo, un videojuego llevado de cero a publicado. No ocho demos sueltas. Las grabaciones y el repositorio quedan para quien asiste.

Taller para padres e hijos — una tarde. Traen los dibujos que su hijo ya hizo y salen con un videojuego que él puede enseñarle a quien quiera. La IA hace en cuatro horas lo que antes tomaba meses; el trabajo real es que colaboren.

Ver los cursos Programa de becas

Talks & workshops

AI, creativity, and getting people to build things.

I speak about applied AI and about why building something together works better than explaining technology at people — the same argument as the classes, aimed at a room instead of a group.

Talks run in Spanish or English. Workshop formats are hands-on: the audience leaves with something they made, which is the only version I know how to run.

Topics

Applied AI in small teams
AI as a creative tool
Teaching technical skills to non-technical people
Parents and teenagers building together

Previously

Coyuntura Disruptiva: Inteligencia Artificial y Creatividad
Universidad de Tijuana CUT — Campus Altamira
22–24 November 2023
Workshop: Creación de fanzine con IA
Event write-up

Email me about an event

Production systems

First one in. A team by the time I leave.

Each of these started the same way: one engineer, no team, and something that had to exist in production before anyone would fund a second hire. I build that first version with the tracing and the safety gates already on it, because the version that proves the idea is the one everything else gets built on.

Then the part that decides whether it lasts — runbooks, a review bar, and hiring and training the people who take it over.

Track record

61: production AI agents
700+: tools across 140 modules
9: live customer phone lines
5+: engineers trained and promoted

Three VPS on a WireGuard mesh, two Postgres clusters with pgvector, Langfuse tracing on every run, and phone lines priced off measured per-minute cost from production call logs rather than a vendor sheet.

Failure modes are structural rather than documented: destructive DDL revoked from the application's database role, and a deploy tool that refuses schema changes without an explicit migration flag.

BiB — one platform, four verticals

Denterly (Dental)
Answers calls, books appointments, follows up with patients around the clock.
Counserly (Law)
Qualifies and intakes new matters on the call, books consultations to the calendar.
Airable (HVAC)
Books service calls and installs on the line, triages jobs, follows up on quotes.
Cadensell (Sales)
An OS for teams of AI sales reps — voice dialing, live call analytics, one SDR command centre.

RevAds

Founding engineer — Private beta — limited initial cohort

Google Ads auditing for service businesses rather than e-commerce — reviews keywords and ad copy, flags wasted spend, and says exactly what to fix.

getrevads.com

See the platform

Hired twice by the same person.

The president of a Wisconsin marketing agency hired me, then sold the company with me on the team. After I was recruited away, she came back and asked me to be the founding engineer at her next venture — RevAds, now in private beta.

Shipped

Things that are finished and playable.

Browser games, all built solo, all still live — a neon shooter, a 3D virtual pet, a mobile fighting game, a party board game, a gothic Bomberman-like, a papercraft-horror roguelite, a dream platformer and an arena survival.

Also a hand-bound micro-press I run with my wife, and a Windows 95 simulator that exists because I wanted to find out whether I could.

Games

Gato Arcade
Arcade Shooter
Twelve ships. Twelve zodiac signs. One shooter that doesn't let up.
Paper Pet Island
Virtual Pet · 3D
A tiny island. A pet that actually needs you.
Cholos vs Emos
Fighting Game
Two subcultures. One fight. Built for a phone in your pocket.
Tijuanopoly
Party · Board Game
Monopoly, but it's actually Tijuana.
CRYPT BREAKER
Arcade · Bomberman-like
Bomberman, but gothic, and the tomb is closing in.
ChipMan
Roguelite
Papercraft horror, Mega Man Battle Network energy.
RUNEFALL
Match-3 Roguelike
The board is the weapon. The dungeon is watching.
IRONWAKE
Horizontal Shooter
Three guns. You choose which one gets fed.
OSSUARY ATLAS
Survey Roguelike
The first map was drawn on skin. The second was drawn beneath it.
Slumber Atlas
Platformer
Feed the dream. Wear the dream. Escape the dream.
Vespercrypt
Arena · Gothic
Purge the restless. Chamber by chamber.