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Networking & Interconnect Systems - Member of Technical Staff

Callosum· Compute & Infrastructure
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LondonFull-timePosted 2mo ago

About the role

Role focused on developing communication systems to enable heterogeneous accelerators to operate as a unified system, optimizing data movement and minimizing latency across protocols, memory movement, networking hardware, and software layers.

Responsibilities

  • Characterise and simplify communication paths between accelerators, tracing latency and unnecessary overhead across networking, runtime, memory, and device layers
  • Develop faster data movement across heterogeneous hardware, exploring RDMA, programmable NICs, DPUs, switches, and software approaches to cross-device memory management
  • Build flexible mechanisms for transferring model state across accelerator types and execution strategies, including KV cache connectors across different forms of parallelism
  • Evaluate existing and emerging scale-up and scale-out fabrics, informing cluster architecture, infrastructure integration, and how heterogeneous accelerator communication should evolve

Qualifications

  • Deep understanding of networking and communication systems, with the ability to reason across protocols, hardware, memory systems, and software layers
  • Experience with high-performance data movement such as RDMA, Ethernet fabrics, accelerator interconnects, programmable networking, or similar latency-sensitive systems
  • Strong systems performance instincts, with the ability to trace bottlenecks across abstraction layers and distinguish fundamental constraints from accidental ones
  • Demonstrable tendency to question existing abstractions, generalise across unfamiliar technologies, and simplify systems around workload requirements

Skills

Required:Networking systemsHigh-performance data movementSystems performance analysis

Benefits

  • Competitive Salary, determined by skills and experience
  • Equity & Ownership
  • Private healthcare
  • Visa sponsorship and relocation benefits to hire the best in the world
  • We work in person at our London office; tools and setup provided; accommodations available upon request
Last updated Oct 14, 2026. Interested? Apply on the company site.

About Callosum

The Intelligent Systems Company.

Callosum - Co-evolving chips & intelligence

AISystems companychipscomputedevelopmentheadline-ai-europe-100-2026heterogeneousinfrastructure
Company profileWebsite

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