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End of page. Start of the working loop.

If this site did its job, the next step is simple: download the public CV, read the field notes, or check the public proof. I am looking for AI product work where the model is only one part of the system.

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Staff / Principal AI engineering roles
best work
harnesses, retrieval, evals, workflow control
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Madrid / remote-first
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context before autonomyevals before confidenceproof beats claimscode must stay legiblesystems over demospublic CV availablecontext before autonomyevals before confidenceproof beats claimscode must stay legiblesystems over demospublic CV available
(c) 2026 Petru Arakisspublic surface for product engineering work
writing

Field notes on production AI.

Long-form notes on harness engineering, context, evals, traces, and the unglamorous parts that make coding agents and AI systems useful after the first demo.

current essays2 pieces
  • 26-06-0727 minAI EngineeringThe Operational Meta-Harness27 min read
  • 26-04-3013 minAI EngineeringHarness engineering for coding agents13 min read
editorial map

What this writing is for.

Harness engineering

How coding agents become useful when the repo, tools, tests, browser, traces, and review loops are designed as one operating environment.

Production AI systems

Retrieval, workflow control, permissions, cost boundaries, observability, and the product surfaces people need when the model is wrong or unsure.

Engineering judgment

Notes on using AI tools without outsourcing taste: where automation helps, where it drifts, and how to keep software legible.