enquiries@famartin.ie →
01 FRACTIONAL CTO — WEB3 · BLOCKCHAIN · FINTECH

I make sure your systems never surprise you.

Fractional CTO for companies that can't afford downtime — 29 years keeping critical systems alive: live DeFi protocols, Rust engines on Azure and AWS, and the infrastructure underneath it all.


02 BACKGROUND & EXPERIENCE

Twenty-nine years on the other side of the outage.

Every system fails eventually. The only question is whether you find out before your customers do. I've spent 29 years making sure the answer is yes.

It started with access gates, payment terminals and wireless networks at a busy ski resort — downtime there means thousands of people stuck in the cold. Then hospital laboratories, where downtime means samples that can't wait. Then a cable operator's call-center platform: 200 servers that had to answer every call, every day, no excuses.

That was the training. Since 2016 I've been building the systems themselves: eight years in blockchain engineering, three as CTO at Woonkly shipping live DeFi — swaps, farms, staking — under real market pressure. More recently I co-built a Rust engine that cut cloud compute costs 40–60% while holding latency under 15 milliseconds. It runs today on Azure and AWS.

Operations teaches you how systems break. Writing the code teaches you why. I do both.

Facundo Martin Argüello — Fractional CTO
Facundo Martin Argüello — Fractional CTO
03 ENGAGEMENT MODELS

Work with me.

Fractional CTO

You raised. Now you need engineering leadership that's been through it before: architecture decisions, hiring, delivery pressure. I work inside your team — and my name goes on the decisions.

Technical Due Diligence

An independent technical read before capital moves. Code, architecture, team, security — plus the uncomfortable questions nobody asked in the pitch meeting. One week. A report your investment committee can act on.

Rust Development

From embedded firmware to cloud tooling: systems that are fast, memory-safe, and still maintainable in two years. Built properly the first time.

Infrastructure & Security Hardening

Monitoring, backups, firewalls, patching — the fundamentals regulators increasingly expect, built for companies that don't have a security department.

04 FOR INVESTORS

Before the wire moves.

The deck is polished. The demo works. What you don't know is whether the system holds when real money and real users arrive.

I read the code, the architecture, the team and the security posture — and I ask the three questions nobody in the room asked. You get a written report your committee can act on. One week, fixed scope.

What I keep finding: infrastructure costing three times the model's estimate. A lead architect who didn't write the code. A roadmap that assumes two hires who don't exist.

05 KEY METRICS
29 — years keeping systems alive
8 — years in blockchain engineering
3 — live DeFi products shipped
−60% — compute cost, worst case
06 CHRONOLOGY

Track record.

2025–now
Independent. Fractional CTO & systems architect. Web3, Rust, cloud.
2025–2026
syrius-ai, co-founder. Rust engine for cloud optimization: sub-15ms, 40–60% less vCPU, Azure & AWS.
2024
Spacevis, Technical Lead. LoRaWAN + satellite IoT platform for cattle operations, Brazil.
2020–2023
Woonkly, CTO. Live DeFi: swaps, farms, staking. ERC20 token, AWS.
2018–2019
Eurocoinpay, CTO. ERC20 token launch, private Ethereum networks for payments.
2016–2024
Blockchain Masters, CTO. Blockchain education & research platform.
1997–2016
The trenches. Ski resorts, hospital labs, cable operator: networks, servers, firewalls, monitoring.
07 GET IN TOUCH

If it sounds like your situation — write to me. The first call is twenty minutes.