Platform Site Reliability Engineer

About the Company

Callosum is the Intelligent Systems Company. We believe intelligence emerges from the diversity of co-optimised mechanisms working together. We co-evolve models, workflows, and silicon to build the infrastructure required for the next era of heterogeneous AI.

Responsibilities

• Define and manage service-level objectives (SLOs), monitoring, alerting, and observability
• Lead on-call and incident response, including runbooks, escalation, and blameless postmortems
• Manage capacity planning and the operational requirements of running across heterogeneous compute backends
• Own the operational health of the production platform end-to-end

Requirements

• Strong SRE or production-engineering background running customer-facing systems at scale
• Fluency with modern operational tooling including observability stacks, container orchestration, infrastructure-as-code, and CI/CD
• Experience owning incident response and driving reliability improvements
• Experience with compliance execution

Preferred Qualifications

• Open-source contributions to relevant infrastructure
• Experience with production systems of significant scale and complexity
• Experience in early-stage and AI-native companies

Benefits

• Competitive Salary
• Equity & Ownership
• Private healthcare
• Visa sponsorship and relocation benefits