Jobs at Callosum

Owns Callosum’s physical compute infrastructure from site assessment and cluster design through deployment, commissioning, and reliable operation. Responsibilities include coordinating power, cooling, rack, networking, storage, fiber, facilities, utilities, and vendor dependencies; building fleet-wide telemetry, monitoring, maintenance, incident response, capacity planning, and hardware lifecycle systems; and hiring and leading the physical infrastructure team.

Open application for engineers working on AI infrastructure and heterogeneous computing. Responsibilities may include high-performance and low-level systems engineering, inference infrastructure, orchestration, distributed systems, hardware bring-up, kernel development, accelerator programming, simulation, modeling, and workload design across diverse AI chips and systems.

Serve as the operational bridge between the CTO, infrastructure teams, and external technology partners. Translate technical and commercial priorities into measurable goals, roadmaps, OKRs, ownership structures, reporting, and operating cadence. Support project leads, coordinate executive alignment, track decisions through completion, and manage partnership-network insights. As an early function hire, establish operating infrastructure and progressively take ownership of commercial strategy for the infrastructure organization.