Networking & Interconnect Systems - Member of Technical Staff

The role

You will develop communication systems that allow heterogeneous accelerators to operate as one system. This involves working across protocols, memory movement, networking hardware, and software layers to improve data movement and reduce latency.

What you will do

• Characterise and simplify communication paths between accelerators
• Trace latency and unnecessary overhead across networking, runtime, memory, and device layers
• Develop faster data movement across heterogeneous hardware
• Explore 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
• Include KV cache connectors across different forms of parallelism
• Evaluate existing and emerging scale-up and scale-out fabrics
• Inform cluster architecture and infrastructure integration

Required qualifications

• Deep understanding of networking and communication systems
• 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
• Ability to trace bottlenecks across abstraction layers
• Ability to distinguish fundamental constraints from accidental ones
• Tendency to question existing abstractions, generalise across unfamiliar technologies, and simplify systems around the requirements of the workload

Benefits

• Competitive Salary
• Equity & Ownership
• Private healthcare
• Visa sponsorship
• Relocation benefits

Before you apply

• We offer Visa sponsorship and relocation benefits to hire the best in the world

About the company

Callosum is the Intelligent Systems Company building infrastructure that unifies heterogeneous compute across the full stack. They are engineers and scientists based in London.