Data & AI Jobs at Callosum
Callosum has 4 open data and AI roles, alongside 12 other open roles.
About Callosum
Callosum is a company building infrastructure for artificial intelligence and computing. It focuses on integrating heterogeneous chips and AI models, allowing hardware and intelligence to co-evolve. The company provides a software orchestration layer that works across different types of accelerators to deliver AI inference tailored to specific workloads. It is based in London.
The open roles
- ML Research Scientist - Member of Technical Staff: London, posted 20 August 2026.
- Research Engineer, Evals - Member of Technical Staff: London, GBP 101k to 192k, posted 20 August 2026.
- ML Research Engineer - Member of Technical Staff: London, GBP 101k to 192k, posted 20 August 2026.
- Applied AI - Member of Technical Staff: London, GBP 101k to 192k, posted 9 June 2026.
Also hiring at Callosum
Callosum is also hiring in engineering (12).
Its roles are in London, UK (16).
What data and AI work involves at an early-stage startup
The data is messy and there is not much of it yet. You build the pipeline, train the model, then explain the result to a founder in plain words. Large employers give you a clean warehouse and one narrow question, while here you pick the question too.
Questions people ask
What else is Callosum hiring for?
Engineering: 12 more roles.