HIRING NOW

Jobs at Callosum

19 open roles, taken from Callosum's own hiring system (ashby) and checked to still be accepting applications.

Hiring in London (19)

• Agent Runtime & Systems - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Networking & Interconnect Systems - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Research Engineer, Evals - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• ML Research Scientist - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Evolutionary Optimisation - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Research Engineer, Benchmarking - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Head of Physical Infrastructure London, GB·Full-time·2026-08-20 →
• Chief of Staff, CTO London, GB·Full-time·2026-08-20 →
• Security Lead - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Compliance Lead - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• ML Research Engineer - Member of Technical Staff London, GB·Full-time·2026-08-20 →
• Site Reliability - Member of Technical Staff London, GB·Full-time·2026-06-16 →
• Applied AI - Member of Technical Staff London, GB·Full-time·2026-06-09 →
• Inference Engine Development - Member of Technical Staff London, GB·Full-time·2026-05-20 →
• Accelerator Systems Software - Member of Technical Staff London, GB·Full-time·2026-05-20 →
• Inference Performance & Deployment - Member of Technical Staff London, GB·Full-time·2026-05-20 →
• Systems Tooling - Member of Technical Staff London, GB·Full-time·2026-05-20 →
• Cloud Systems & Resource Orchestration - Member of Technical Staff London, GB·Full-time·2026-05-20 →
• Expression of Interest - Intelligent Systems Engineer London, GB·Full-time·2026-02-25 →