Jaime Ignacio “Nacho” Rovirosa Fractional Infrastructure Engineer

AI & SaaS startups · seed–Series B

Engineering decisions are business decisions.

I work with founders whose cloud bill grows faster than revenue, whose systems nobody can predict at 10x, and whose customers report the outage before the alerts do. 20 years of infrastructure, applied a day or two a week.

DM me on LinkedIn

Does this sound like your quarter?

Symptoms

If any of these are true, that’s exactly the work I do.

Three problems I take off your plate

Focus areas
Cost

Cost optimization

The cloud bill grows faster than revenue.

Find where the money actually goes, cut what isn’t earning its keep, and leave you a bill that scales with the business instead of ahead of it.

Scale

Scalability & performance

Nobody knows what breaks first at 10x.

Load-test the assumptions, remove the bottleneck before your biggest customer finds it, and make growth an infrastructure non-event.

Reliability

Observability & reliability

Customers report the outage before the alerts do.

Instrument what matters, page on what’s real, and turn incidents from firefights into fifteen-minute fixes.

How I work

Engagement models

Fractional

1–2 days a week inside your team — the staff infrastructure engineer you’re not ready to hire full-time.

Well-Architected audit & fix

Your AWS environment assessed against all six pillars of the Well-Architected Framework, with audit tooling I built for the job. Findings with dollar figures and a prioritized fix list — fixing them is phase two.

Architecture rescue

When the microservices multiplied or the AI pipeline got away from you: consolidate, simplify, ship.

SOC 2 readiness

Gap assessment, remediation, and walking you into the auditor’s room. I’ve taken startups through SOC 2 twice — plus HIPAA and a top-tier-bank security review.

How an engagement runs

Process
Step 1

Assess

I look at the real system: bills, architecture, pipelines, alerts.

Step 2

Prioritize

You get a findings list with dollar figures and risk, ranked.

Step 3

Fix

We execute the top of the list together, or I do it fractional.

Step 4

Hand off

Runbooks and docs so your team owns it after I leave.

Some examples

Selected results

$1.5M/yr

Cut 40% of OpEx from a consumer social platform’s AWS and observability bills — with 26% faster media delivery.

250 → 3

Core engineer on collapsing 250 microservices into a modular monolith at a healthcare-AI startup, HIPAA intact.

#1

Built a serverless ML platform from zero — thousands of concurrent trainings, ranked first by Gartner, Fortune-500 in-VPC deploys.

330K+ users

Built and scaled a fintech-messaging startup’s infrastructure from zero, supporting 330,000+ users globally at top financial institutions.

20+ yearsFounding engineer at 5 startupsFounder who raised and sold

If one of these problems sounds like your quarter, let’s talk.

DM me on LinkedIn