C
Est. £169K–£358K/yrOn-siteStaff / PrincipalVisa sponsorshipEquity / stock options
Posted 5d agochecked 3d ago
13 open jobs · 2 measured scores
Jobs read from Callosum's own hiring system
Updated 16 Oct 2026
Measured by JobRipe from real listings and applications people tracked. A score appears only when there is enough data behind it.
Job freshness
62% fresh
Some stale listings
13 open listings
Share of open listings our ghost-job check does not flag. A listing is flagged when it has been open for months, uses evergreen 'talent pool' wording, or the same role was posted again after closing.
Shown only with 10+ open listings. Updated 16 Oct 2026.
Pay transparency
0%
Rarely shows pay
0 of 13 open listings show pay
Share of open listings that state a pay range. Pay that job boards only predicted is not counted.
Shown only with 10+ open listings. Updated 16 Oct 2026.
Reply rate & speed
Not enough data yet
Shown once there are 10+ settled applications from 3+ people.
No-ghosting pledge
Not enough data yet
Shown once there are an active no-ghosting pledge.
Hiring trend
Not enough data yet
Shown once there are 10+ jobs over 90 days, followed for 90+ days.
Pay vs similar employers
Not enough data yet
Shown once there are 5+ salaried ads with comparable jobs at 3+ other employers.
Interview process
Not enough data yet
Shown once there are 10+ tracked applications from 3+ people, or 3+ applicant reviews.
Yes. JobRipe lists 13 open jobs at Callosum, mostly in software engineering, research, data science & ml.
Callosum's open jobs on JobRipe are in United Kingdom (13).
Rarely shows pay: 0 of 13 open listings show pay (0%).
Some stale listings: 62% of 13 open listings show no sign of being stale or re-posted.
London, United Kingdom
Questions about working at Callosum, answered only by people who confirmed a work email there. Names are never shown.
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Reviews, salaries and benefits from employees who confirmed a work email. Names are never shown.
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Not enough verified salaries yet. A role appears once 5 verified employees from at least 3 different people share theirs, and only as a range. Add yours anonymously
Benefits appear once 5 verified employees of Callosum answer. Tick yours
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