Security Lead - 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
Callosum operates across a broad technical surface: APIs used by customers directly, orchestration software deployed across heterogeneous clusters, agentic systems with access to tools and data, and physical compute infrastructure that we operate ourselves. These products run in very different environments and for customers with very different security requirements, from shared cloud infrastructure through to…
The opening lines of the posting. The rest is on Callosum’s careers page.
Hiring at Callosum
Callosum has 14 open roles right now. Most are in Engineering and Security. See all its roles
