Heterogeneous AI Infrastructure Engineer at Callosum, London

Looking for AI infrastructure jobs in the UK with visa sponsorship? Callosum is hiring a Heterogeneous AI Infrastructure Engineer in London.

Photo: High-performance computing infrastructure via Wikimedia Commons.

Callosum builds the infrastructure for heterogeneous AI systems, routing workloads across different models and chips. The London company, founded by Cambridge PhDs, raised $100 million in seed funding in 2026.