Research Engineer, Benchmarking - Member of Technical Staff is open at Callosum in London. Posted on Aug 20, 2026, and still on Callosum’s careers page when we last checked, on Nov 14, 2026.
About the role
Choosing between algorithmic strategies for multi-step LLM work is a measurement problem, and most teams solve it badly: comparisons run case by case, by whoever needs them that week, on whatever task is closest to hand. That doesn't scale, and it doesn't hold up to outside scrutiny - from a customer, or from a reviewer. Callosum needs one benchmarking system: reproducible, contamination-controlled, and trusted…
The opening lines of the posting. The rest is on Callosum’s careers page.
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