Marcos Fernandez marcosfernandez.io Book a call
Open toPrincipal and staff engineering, platform and infrastructure leadership, and advisory roles. Available now. Remote, or Pacific time. Full record on LinkedIn. For a short engagement instead of a role, see marcosf.me.

Engineering leader for data platforms and AI infrastructure.

Large-scale analytics and machine-learning data platforms at Apple; operating systems, service infrastructure and release reliability at Microsoft; and, since 2026, independent research into GPU serving and persistent inference state, published as I go.

Book a free 30-minute call Free, thirty minutes, once per company. An intro call, not an interview. You pick the slot; the invite arrives with a Google Meet link.
The record, in order

The record, most recent first.

  1. Independent research, AI infrastructureMulti-GPU inference serving, a reusable KV-cache tier across workers, autonomous development under engineering control. Published on Medium with configurations and results: the KV-cache run, 25 September 2026; all write-ups.
    2026
  2. Apple, analytics and machine-learning data infrastructureOwned large-scale data platforms: distributed processing, platform tooling, production pipeline operations and the engineering workflows around them. Cross-functional coordination, hiring and mentoring.
    most recent employer
  3. MicrosoftOperating systems, service infrastructure, automation and release reliability across large engineering organisations.
    earlier

How I lead.

Diagnose the actual bottleneck, instrument it, and keep the conditions behind every measurement. Design abstractions other engineers build on. Reduce delivery friction so the team's effort reaches production. Hire for judgement and grow it.

Scope I have carried: platform teams, the tooling and release systems of large organisations, and the technical decisions that outlast the people who made them.

Recent writing on engineering practiceHiring managers: you can't reject both sides of the same coin. September 2026.

If you have a role or a problem that needs this background, let's talk before the paperwork.

Thirty minutes, free, once per company. An intro call, not an interview: what you need, what I have done, whether it fits. Nothing to prepare.

Book a free 30-minute call
Who the call is forHiring managers, founders and recruiters with a specific role in mind.