Facundo Humphreys

AI Lead Engineer · Buenos Aires, Argentina

Production AI, built by someone who’s run production.

Six years across five sectors — Chile’s first neobank, a 100M-user streaming platform, enterprise travel tech. Compliance systems, event-driven data platforms, sub-200ms money movement. I bring that same discipline to AI: the pipelines, the cost ceilings, and the pager.

100M+ users served
50k+ daily transactions under 200ms
40% data-pipeline latency removed
6+ years, startup to enterprise

AI in production

The model was never the hard part.

Anyone can get a demo working. Keeping an agent useful once it touches real systems is a distributed-systems problem — permissions, cost ceilings, latency budgets, what it does when the model is wrong, and someone carrying the pager afterwards. I build agents that do real work inside engineering organisations, on the same production foundations I have operated for six years.

01

Agents inside the delivery pipeline

Local agents built on Claude Code, Copilot and Codex, aimed at the parts of shipping that actually cost time: code review, code generation, and deployment. Treated like any other production dependency — standards around them, review gates in front of them, and a clear view of where they stop being trustworthy.

Claude Code · GitHub Copilot · Codex

02

Property investment agent

A conversational agent over Buenos Aires rental listings. Paste a listing URL and it answers the only two questions that matter to a buyer: is this priced as an opportunity, and what annual yield would it actually return?

Side project, in progress.

Built on Claude, GPT and self-hosted open-weight models, chosen per task rather than by habit — and tuned for cost and latency, because an agent nobody can afford to run is not in production.

Method

How I build AI that survives contact with production.

  1. 01

    Evals before features

    If you can’t measure the output, you’re shipping vibes. The harness comes first, and it stays in CI.

  2. 02

    The model is ten percent of it

    Permissions, pipelines, cost ceilings, latency budgets, fallbacks. That is the system. The model is one component inside it.

  3. 03

    Own it all the way to the pager

    Prometheus and Grafana on AI systems, same as any other service. Shipping ends when it’s observable, not when it merges.

Experience

Five sectors. Startup, mid-size, enterprise.

Travel, banking, messaging, streaming, lending. Every one wanted something different: an enterprise where the problem was fifteen legacy provider integrations; Chile’s first neobank, where the user count moved twentyfold underneath me; a platform pushing films and series to a hundred million people. Dropping into an unfamiliar domain and being useful quickly is the part that transfers — the stack has always been the easy half.

Apr 2025 — Present Remote

Senior Scala Engineer

RyzLabs (Tala)

Lending · mid-size fintech, regulated money movement

  • Implemented an anti-money-laundering system for loan disbursements to meet regulatory compliance requirements.
  • Delivered Scala/Java services from PostgreSQL and Kafka design through CI/CD, Kubernetes, and production monitoring.

Apr 2023 — Apr 2025 Remote

Senior Software Engineer

Qubika (Disney+)

Streaming · films and series to 100M+ users worldwide

  • 100M+ users served by the Scala/Kotlin systems I built; cut Spark data-pipeline latency by 40%.
  • Owned architecture, testing, event streaming, AWS deployment, and production operation.

Apr 2023 — Dec 2023 United States

Full Stack Engineer

MediaLab (Kik)

Messaging & streaming · US consumer app

  • Shipped Java/Golang real-time messaging services and React features; operated multi-region Kubernetes across AWS and GCP.

Jan 2022 — Apr 2023 Argentina

Full Stack Developer

Tenpo (Fintech)

Banking · Chile’s first neobank, 100K → ~2M users

  • Built PayPal settlement flows processing 50k+ daily transactions under 200ms, plus customer-facing accounting dashboards.
  • Stayed load-bearing while the platform grew from 100K to nearly 2M users — what I built was stress-tested by growth rather than by a roadmap.

Jan 2021 — Jan 2022 Argentina

Java Developer

Despegar (Travel Tech)

Travel & tourism · LATAM enterprise

  • Delivered 15+ flight-provider integrations and reduced booking-system latency by 30%.
Systems Engineering — Universidad Tecnológica Nacional (UTN) 2017 — 2022

Speaking

Explaining hard systems to rooms that don’t build them yet.

ORT University × Qubika · guest lecture

Demystifying Blockchain DAOs: a practical roadmap

A guest lecture for engineering students on decentralised governance — what a DAO actually is underneath the terminology, and the practical path from smart contract to something people can use.

Available to speak on:

  • Putting AI into production
  • Agents inside the software delivery pipeline
  • Event-driven architecture at scale
  • Fintech compliance engineering
  • Blockchain & DAO governance

Capabilities

The toolkit.

AI

  • LLM application design
  • Agent design & tool calling
  • OpenAI SDK
  • Agentic coding tooling
  • Inference cost & latency

Build

  • TypeScript · React
  • Scala · Kotlin · Java
  • Python · FastAPI
  • Golang
  • Spring Boot

Systems

  • PostgreSQL
  • Kafka · Spark
  • AWS · GCP
  • Docker · Kubernetes
  • CI/CD · Prometheus/Grafana

Blockchain

  • Solidity · Ethereum
  • Smart contracts
  • DAO governance
  • OpenZeppelin
  • web3.js

Beyond coding

Things I’m equally serious about.

Facundo strapped into a snowboard on a mountain slope

Snowboarding

Every winter, as high as the lift goes

Facundo biting his finisher medal after a half marathon

Running

Medio Maratón, Mar del Plata

Facundo plating a dish on the line in a professional kitchen

Cooking

Mise en place is just good system design

Also: surfing whenever there is cold water and no signal, and a lifelong, medically inadvisable commitment to Boca Juniors.

Contact

Let’s build something that stays up.

Open to AI Lead and Staff Engineer roles. Remote from Buenos Aires, or relocating for the right team.

Available for new work