SYSTEMS ENGINEER · CÓRDOBA, ARGENTINA
Full stack development and AI integrations for businesses.
I design, build and deploy web systems, AI assistants and automations. I work on systems used by more than 100,000 students, a store in Córdoba and teams in Colombia and Europe.
- SINCE 2023
- PSI · National University of Córdoba
- ALSO
- AI agent evaluation platform · European startup
- FREELANCE
- Argentina · Colombia · Europe
What do you need?
Pick what you need solved and I'll show you the projects where I've already done it and what I built them with.
What I offer
What I've built · 2026 → 2023
Built with
A · AI ASSISTANT
An assistant that answers from your information and says so when it doesn't know.
Answers from your own information, on the web or WhatsApp.
I build it on what you already have (manuals, FAQs, catalog) and put it where your people are: web or WhatsApp. Whatever it can't answer, it hands off to a person.
- Assistants for the UNCRAG over manuals and FAQs · 2025
- Hunter's Gallery WhatsApp assistantdrafts, a person approves · 2025 → now
- AI agent evaluationautomated tests before production · 2026 → now
B · AUTOMATION
Let the system do the repetitive work and your team look after your customers.
I automate the repetitive work so your team has time and answers your customers faster.
Entering data, cross-checking spreadsheets, reconciling payments, generating receipts: the system does that. Your team gets time back to deal with people, and unclear cases go to a queue where a person decides with a suggested answer in front of them.
- AI-assisted bank reconciliationvehicle paperwork, Colombia · 2026
- Hunter's Gallery orders and invoicingfrom WhatsApp to the e-invoice (ARCA) · 2024 → now
C · CUSTOM SYSTEM
A custom management tool: everyone sees what concerns them and every change is recorded.
Built around your team, with per-person permissions and a history of every change.
I map how your team works today and design the system that replaces it in stages, starting with the spreadsheet that hurts the most.
- Hunter's Gallerycomplete system for a sporting goods store · solo
- Vehicle paperworkIAM, audit, cashier · Colombia
- Traffic violation validationColombia
- Single sign-on and self-servicePSI · UNC · over 100,000 students
- CienciaConectaGovernment of Córdoba · team lead
D · WEBSITE OR CATALOG
A website or catalog made for your business, no templates.
To sell or to present what you do, easy to read on a phone.
If you sell, a catalog that builds the order and sends it to your WhatsApp; if you want to present what you do, a clear site that adapts to phones and computers.
- Hunter's Gallery public catalogorder → WhatsApp · 2025 → now
- CienciaConecta portalproject registration and evaluation · 2023
PROJECT
AI agent evaluation
Companies putting AI agents in front of their customers without knowing how they can fail. Full stack development of a platform that tests AI agents automatically and reports every failure.
PROJECT
Assistants for the UNC
Thousands of repeated student questions: accounts, access, procedures. Assistants that answer from the official manuals and hand off to a person when they don't know.
PROJECT
Vehicle paperwork
Offices that take and reconcile payments by hand, with no trace of who did what. Portal with cashier, receipts and AI-assisted bank reconciliation; everything audited. I built the audit log, the cashier module and the exceptions queue.
PROJECT
Traffic violation validation
Cameras that detect violations; people who have to validate them one by one. Review portal with device management, coverage maps and role-based validation.
PROJECT
Hunter's Gallery
A store that sold through a personal WhatsApp without keeping any records. Today it has a catalog, internal management, invoicing with ARCA and an assistant that drafts replies for a person to approve.
PROJECT
AI meeting analysis
Meetings where what gets decided is never written down. Full stack development of an AI platform that analyzed meetings, built for Italian.
PROJECT
Single sign-on and self-service
Systems used by more than 100,000 students. Single sign-on with two-factor authentication, user management, self-service systems, automated deployments and legacy code maintenance.
PROJECT
CienciaConecta
A provincial science fair run on paper and email. A role-based system to register and evaluate projects, for two ministries. I led a team of four.
TECHNOLOGY
Language models · RAG
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
LangGraph
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
Python
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
Next.js
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
TypeScript
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
React · Node
Highlighted: the projects where I used it and the services they back.
TECHNOLOGY
MongoDB
Highlighted: the projects where I used it and the services they back.
Work
Newest to oldest. The problem first, then what I built.
- 2026 → now · AI startup · Europe AI agent evaluationAI startup · Europe→ Companies putting AI agents in front of their customers without knowing how they can fail. Full stack development of a platform that tests AI agents automatically and reports every failure. Full stackTypeScript · React · Node
- 2026 · Colombia Vehicle paperworkColombia→ Offices that take and reconcile payments by hand, with no trace of who did what. Portal with cashier, receipts and AI-assisted bank reconciliation; everything audited. I built the audit log, the cashier module and the exceptions queue. Full stack · team of 3Next.js · TypeScript
- 2024 → now · Sporting goods store · Córdoba Hunter's GallerySporting goods store · Córdoba→ A store that sold through a personal WhatsApp without keeping any records. Today it has a catalog, internal management, invoicing with ARCA and an assistant that drafts replies for a person to approve. Full stack · soloNext.js · Node · MongoDB
- 2023 → now · PSI · UNC Single sign-on and self-servicePSI · UNC→ Systems used by more than 100,000 students. Single sign-on with two-factor authentication, user management, self-service systems, automated deployments and legacy code maintenance. Software engineerVue · Node · MongoDB
About
I've been programming since I was seventeen. I studied Systems Engineering at UTN FRC and since 2023 I've worked at the IT Office (PSI) of the National University of Córdoba: authentication, user management and the self-service systems used by more than 100,000 students. In 2024 I started taking on freelance projects: a sporting goods store, two AI startups in Europe and two systems for the traffic sector in Colombia. The details are in my CV.
What shaped me wasn't the stack but the brief: sitting down with someone who doesn't speak software, turning it into something buildable and owning it all the way to deployment. That's what I offer.
- EDUCATION
- Systems Engineering, UTN FRC. Highest GPA in my graduating class.
- AWARD
- Ing. Isidoro Marín 2024, National Academy of Engineering (Argentina).
- LANGUAGES
- Native Spanish · English C2.
- HOW I WORK
- First call is free. Proposal with fixed scope and price. Delivery in stages. Support after delivery.
- LOCATION
- Córdoba, Argentina · remote.
Got something in the works?
villarrealtomas@hotmail.comI reply the same day. You can also find me on LinkedIn and GitHub.