RoleDawn
Companies / Callosum

Callosum hiring trends & signals

Callosum has 12 open roles on its Ashby careers board across 4 role families. The biggest hiring areas right now are Software Engineering (6), ML / AI (3), Platform / SRE (1). 1 role was posted in the last 30 days. 0% of open roles are remote-friendly, and the most common location is London.

12
open roles
4
role families hiring
1
posted in last 30 days
0%
remote-friendly

Hiring by role family

Software Engineering
6
ML / AI
3
Other
1
Platform / SRE
1
Security
1

Postings per month

3
05/26
0
06/26
0
07/26
7
08/26
1
09/26
0
10/26

By ATS publish date of roles we have seen (open and closed).

Recent signals

No first-hire or surge signals for Callosum yet. We re-check this board daily.

Open roles (12)

RoleFamilyLocationPosted
Expression of Interest - Internships Other London 2026-09-23
Security Lead - Member of Technical Staff Security London 2026-08-20
Research Engineer, Evals - Member of Technical Staff ML / AI London 2026-08-20
Agent Runtime & Systems - Member of Technical Staff Software Engineering London 2026-08-20
ML Research Engineer - Member of Technical Staff ML / AI London 2026-08-20
Evolutionary Optimisation - Member of Technical Staff Software Engineering London 2026-08-20
Research Engineer, Benchmarking - Member of Technical Staff ML / AI London 2026-08-20
Networking & Interconnect Systems - Member of Technical Staff Software Engineering London 2026-08-20
Inference Performance & Deployment - Member of Technical Staff Software Engineering London 2026-05-20
Inference Engine Development - Member of Technical Staff Software Engineering London 2026-05-20
Accelerator Systems Software - Member of Technical Staff Software Engineering London 2026-05-20
Expression of Interest - Intelligent Systems Engineer Platform / SRE London 2026-02-25

Source: Callosum careers page on Ashby.

Where Callosum is hiring

London
12

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Last checked 2026-10-05 · Data from Callosum's public Ashby job board.