Summary

Callosum is hiring a Member of Technical Staff to build the runtime and programming model for long-running agent systems. The role is based in person at the London office and focuses on distributed execution, observability, secure tool execution, and Python-based framework design.

Responsibilities

• Design stateful asynchronous agent runtimes
• Define checkpointing, replay, and recovery semantics
• Build tracing and time-travel debugging tooling
• Develop Python APIs, libraries, and DSLs
• Design scheduling and secure tool isolation
• Develop trajectory analysis and regression tooling