Agent Runtime & Systems - 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
Most agent frameworks are designed for short-lived workflows, best-effort execution, and a narrow set of tools. Callosum is building for a different world: agents that run for weeks, operate across distributed infrastructure, and interact with stateful systems where failures, retries, and side effects must be handled explicitly. Success in this environment requires an agent runtime built entirely from first…
The opening lines of the posting. The rest is on Callosum’s careers page.
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