Callosum
Software Development
Is Callosum hiring?
Yes. As of November 4, 2026, Callosum has 11 open roles on Metaintro.
Open roles
Newest first. Pay shown when the posting lists it.
RoleLocationSetupPayPosted
- ML Research Engineer - Member of Technical StaffArtificial Intelligence/Machine LearningLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Evolutionary Optimisation - Member of Technical StaffArtificial Intelligence/Machine LearningLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Networking & Interconnect Systems - Member of Technical StaffScience, Technology, Engineering, and MathLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Research Engineer, Benchmarking - Member of Technical StaffArtificial Intelligence/Machine LearningLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Security Lead - Member of Technical StaffSecurityLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Agent Runtime & Systems - Member of Technical StaffDeveloperLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Research Engineer, Evals - Member of Technical StaffArtificial Intelligence/Machine LearningLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—Aug 20, 2026
- Inference Performance & Deployment - Member of Technical StaffDeveloperLondon, England, United Kingdom · On-siteLondon, England, United KingdomOn-site—May 20, 2026
Hiring pattern
How fast Callosum is adding roles, and how they're set up.
New roles each monthRoles first posted in the month
2
11
0
0
0
JulyAugustSeptemberOctoberNovember
Skills they ask for
Most frequent across open postings.
Most requested skills
- Python
Tech stack
- CMS
- Sanity
- Frameworks
- Next.js
- Analytics
- Google Tag Manager
- Libraries
- Tailwind CSS
- D3.js
Company facts
- Industry
- Software Development
- Sector (NAICS)
- Information
- Peer
- Website
- callosum.com
- Careers
- callosum.com/join-us
Similar companies
Companies in the same industry as Callosum that are hiring now.
Questions about Callosum
- Is Callosum hiring?
- Yes. As of November 4, 2026, Callosum has 11 open roles on Metaintro. The most are in Developer (5), Artificial Intelligence/Machine Learning (4), and Science, Technology, Engineering, and Math (1).
- What skills does Callosum look for?
- Its open roles most often ask for Python.