Callosum

Cloud Systems & Resource Orchestration - Member of Technical Staff

Callosum
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4 months ago
London, United KingdomSenior
H1B sponsor

Responsibilities

  • Design and build multi-cloud orchestration systems with unified deployment and scheduling abstractions.
  • Extend Kubernetes, including Dynamic Resource Allocation, for heterogeneous accelerators and multi-agent AI workflows.
  • Implement intelligent load balancing and placement across cloud providers, regions, and hardware types.
  • Build control-plane systems for allocating and managing heterogeneous accelerator capacity.
  • Collaborate with Accelerator Systems Software engineers to expose low-level scheduling primitives.
  • Support reliable operation of large-scale heterogeneous infrastructure through infrastructure-as-code and fleet-management practices.

Requirements

  • Strong experience with Kubernetes internals, including custom controllers, schedulers, device plugins, CRDs, and the Dynamic Resource Allocation framework.
  • Experience building or operating multi-cloud infrastructure with detailed knowledge of networking, storage, and compute differences across major providers.
  • Familiarity with GPU and accelerator resource management in clusters, including MIG, time-slicing, device plugins, and topology-aware scheduling.
  • Experience with infrastructure-as-code, fleet management, and reliability engineering for large-scale heterogeneous systems.

Benefits

  • Competitive salary determined by skills and experience.
  • Equity and ownership.
  • Private healthcare.
  • Visa sponsorship and relocation benefits.
  • In-person work at the London office with provided tools, space, and setup.

Tech Stack

Categories

Callosum

About Callosum

11-50 employees
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