Open roles at Callosum
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What they do
Callosum has secured $91.875 million in seed funding to develop heterogeneous computing systems software that optimizes AI tasks with cost-effective models and hardware. The funding round was led by Atomico, with participation from Plural, DCVC, and the UK Sovereign AI Fund.
Why it matters
Callosum is building a software infrastructure that enables AI workloads to run across various chips and models, effectively challenging the prevailing notion of a single dominant AI model. Their approach aims to enhance efficiency and reduce costs in AI computation, making it more accessible for diverse applications.
Traction
Callosum is positioned to serve a wide range of industries by optimizing AI workloads, although specific customer names and revenue figures have not been disclosed. The company has established partnerships with notable firms, including Cerebras Systems, indicating a strong interest in their technology.
Where the market is going
Callosum is directly challenging the dominance of Nvidia and similar incumbents by promoting a multi-chip, heterogeneous approach to AI computation. This shift could democratize access to AI capabilities, allowing a broader range of companies to leverage advanced AI without being constrained by high costs and reliance on uniform hardware.
Why Callosum is hiring
Callosum closed a $91.9M funding round in August 2026, with investors including Atomico, Plural, DCVC and others. It currently has 12 open roles, 1 of them posted in the last 30 days, with hiring concentrated in London. Companies tend to grow headcount fastest in the months after a round, so now is a good time to apply.
Teams hiring
Where Callosum hires
- London12
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Callosum jobs: common questions
Is Callosum hiring?
Yes. Callosum has 12 open roles on SuperAIJobs right now, including 1 posted in the last 30 days. The list is refreshed daily from Callosum’s own careers site.
Where are Callosum jobs located?
Most open roles at Callosum are in London.
Does Callosum hire remotely?
None of Callosum’s current roles are listed as remote, so expect to work from one of its offices.
How much has Callosum raised?
The latest round we track is a $91.9M funding round in August 2026. Investors include Atomico, Plural, DCVC and others. See the full deal history on MapCo.
What does Callosum do?
Callosum is building a software infrastructure that enables AI workloads to run across various chips and models, effectively challenging the prevailing notion of a single dominant AI model.
How do I apply for a job at Callosum?
Every role on this page links straight to Callosum’s own application page, so you apply directly — SuperAIJobs never sits in between.