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Staff Engineer – LLM‑Driven Evolutionary Optimisation

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: AI Startups UK
Full Time position
Listed on 2026-09-04
Job specializations:
  • Software Development
    AI Engineer (Applied/Software), AI Reliability/ Performance Engineer
Salary/Wage Range or Industry Benchmark: 110000 - 150000 GBP Yearly GBP 110000.00 150000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Callosum is building the next generation of AI systems in London, delivering an LLM-guided search loop that evolves programs across kernels, runtimes, and policies. You’ll own the evolution loop, improve search quality, and extend the system to new verification domains.

You’ll collaborate across hardware, software and ML teams, turning experiments into scalable, reliable tools while advancing optimisation methods for heterogeneous workloads.

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