Riel St. Amand

I ship systems, train models, and write down what happened.

Senior full-stack engineer. Production ML since 2020. Read the GRPO study, see Galen in production, or browse all work.

Dispatch → OrchestratorGalenForecasting with a known answerWhen RL post-training helps

About

I’ve spent six years shipping production systems, including ML with real stakes — a COVID diagnostics ensemble that read PCR curves in the browser with zero reported errors across a million-plus diagnoses. Lately it’s been RL post-training, verifiable evaluation, and the tooling that makes model behavior something you measure instead of guess. The map above has all of it.

Currently interested in AI and developer tooling, full-stack product engineering, and research-engineering problems.

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