Research Engineer, Evals - Member of Technical Staff

Company

Callosum

Where

London

Level

Staff

First seen

August 21, 2026

Listed via

Ashby

What the posting says

This role owns the first of those fronts. Agentic evaluation today is not up to the job: benchmarks saturate, scores move for reasons unrelated to capability, results fail to reproduce across runs, and a single number tells you nothing about which step went wrong. Every design decision the rest of the team makes rests on the quality of that instrument. You will build measures whose construct we can defend, whose variance we understand, and which localise a failure rather than merely scoring it. The mandate is broad, and most of the questions inside it are still unanswered. You will have wide…

Read more and apply on Callosum's site

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