About

Marco Guillermaz

Fractional product manager and AI builder, based in Milan. I work with founders, scaleups and enterprises who need senior product depth, and I ship the software to back it.

How I got here

I did not start in product. I started in QA, testing other people's software, which turned out to be the best training for building my own. You learn exactly where things break, and you stop trusting a feature until you have seen it survive real use.

I carried that into product. At Facile.it I was promoted from QA to the company's first product manager, and I have owned outcomes rather than tickets ever since. The part of the job I care about most is the team: good discovery and a clean roadmap matter, but the durable value is in giving developers a process that holds and helping them grow into real product owners.

These days that includes bringing AI-assisted development into how a team works day to day, with enough governance that it stays reviewable. And I build: the clearest example isStaff Manager, an internal platform I owned as product and code for 500-plus collaborators. Alongside client work I maintainTierward, an open-source scaffold for adopting AI coding tier by tier, with guardrails built in. MIT-licensed and on npm. The principle: Claude generates, your team decides.

Experience

Fractional Product Manager & AI BuilderMarco Guillermaz · Product & AI · 2026 - presentFractional product leadership plus direct building with AI: Claude Code, n8n and RAG, with governance.
Senior Product ManagerAD Cube · 2026Roadmap for an AI-powered AdTech platform in the Mondadori Media MarTech ecosystem; ML capabilities turned into production-ready features.
eCommerce Digital PM (Growth, Automation & AI)Testbusters · 2023 - 2026Led a zero-downtime headless replatforming (WooCommerce to BigCommerce, Next.js, Builder.io), then built the automation and AI around it: n8n post-purchase flows, internal RAG assistants, multi-brand product feeds.
Product Manager, B2B SaaS · first PMFacile.it · 2018 - 2023 (QA 2017 - 2018)Built the product function from zero, promoted from QA. Credit-lifecycle SaaS for the largest broker network in Italy.
Software QACHILI · 2011 - 2017Among the first hires through to 100-plus people. QA across web, mobile and Smart TV (JMeter, Robot Framework, Postman); performance testing; international OTT scaling.
QA Engineer (consultant, at Fastweb)Hewlett-Packard · 2011First professional role. Validation of network VoIP devices for Fastweb; functional and performance test plans.

Education

BSc, IT for TelecommunicationsUniversità di Milano · 2005 - 2008
Master in Digital Product ManagementTalent Garden · 2019
Selected masterclassesProduct Marketing (Product Heroes, 2023) · Lean Product Management (Product Front, 2021) · Product Owner Key Skills (Avanscoperta, 2018) · Public Speaking & Diction (Mohole, 2025)

Languages

Italian (native) · English (C1, full professional proficiency)

Open to fractional retainers or one-off projects.

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