Why this works
PreVettedAI didn't appear out of nowhere. It's the productized version of an engineering partnership Federico Ramallo has been running for ten years.
The proof is the tenure.
Density Labs has been embedding senior LATAM engineers into US engineering teams since 2016. The industry average client tenure is 18 months. Ours is more than ten years. That's not luck. It's what happens when vetting, integration, and follow-through are treated as the work, not the wrap-up.
Of cross-border partnerships
Founded in 2016 — Density Labs has been running engineering integrations across the Americas long enough to know what breaks at month 4, month 12, and year 3.
Client retention
Most engineering staffing relationships end in 18 months. Density Labs partnerships compound for a decade because we're paid to be useful, not to be busy.
Conversations on the record
The PreVetted Podcast — Federico's long-form interviews with VPs of Engineering, CTOs, and operators on what actually works when teams are spread across borders.
Federico Ramallo, Founder.
Federico shipped his first line of production code at 15, running a startup in Buenos Aires with coaches from Microsoft. The dot-com bubble burst, an acquisition fell through, and Microsoft hired him at 16. By the time he was sitting in conference rooms demoing software to executives at Argentina's largest telecoms, he had already built and lost a company.
Twenty years later he founded Density Labs — an engineering partnership that connects mid-market US companies with senior engineers in Latin America. PreVettedAI is the productized version of that decade of work.
He's the host of the PreVetted Podcast (150+ episodes) and the author of The Invisible Distance, a field manual for engineering leaders running cross-border teams (Q3 2026).
Founder, Density Labs (2016 – present)
Host, PreVetted Podcast (150+ episodes)
Author, The Invisible Distance (Q3 2026)
Lives in Buenos Aires & Guadalajara
Two missions, one product.
Help more engineers level up.
Great LATAM engineers don't lack ambition; they lack access to the kind of US engineering teams that stretch them. PreVettedAI is the bridge — vetting that respects their time and partnerships that turn a job into a career arc.
Help managers find talent faster.
Hiring great engineers shouldn't take six months and six recruiters. We did the sourcing, the vetting, the payroll, and the legal so you can do the part you're actually good at: picking and shipping.
PreVettedAI is what happens when a ten-year engineering partnership decides to put its hiring playbook on a 14-day clock and let more people benefit from it. Same standard. Same long view. Just a much shorter wait.
Want to talk to a current client?
If you're seriously evaluating us, we'll set up a 20-minute call with one of our long-tenure clients. Real engineering manager, no scripts.
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