Callosum

The Stack take: what job seekers should know about Callosum

• Visa sponsorship: ✅ 5 of 5 jobs. These job ads say they offer visa sponsorship. This is what the ads say. Confirm with Callosum before you move. More visa jobs in the United Kingdom
• Where: United Kingdom. All 5 jobs are here. None marked remote.
• Pay: GBP 101,000–192,000. Per year, from 3 job ads that give pay.
• Latest job: 7 Jul 2026. 0 jobs posted in the last 30 days.
• Roles: DevOps Engineer. DevOps Engineer (2), Platform Engineer (2), Product Manager (1). More DevOps Engineer visa jobs
• Skills they ask for: Production Engineering, API Design, Backend Engineering. The skills named most in its job ads.

Which visa in the United Kingdom?

Skilled Worker visa. The usual visa for non-EU tech workers in the United Kingdom.

• 💶 Standard minimum salary: £41,700 a year, or the going rate for the job if higher
• 💶 Minimum salary, lower rate in some cases: At least £33,400 a year

Checked 2026-10-22. 📖 United Kingdom visa guide

Before you apply

• 📖 Read the full job ad. Check the skills and the city.
• 🛂 Need a visa? Ask Callosum to confirm sponsorship in your first call.
• 🔔 Get job alerts to see new Callosum jobs first.

Visa sponsorship at Callosum

5 of Callosum 's 5 listings on The Stack (100%) are marked as offering visa sponsorship.

Sponsored listings posted between 2026-06-09 and 2026-07-07.

Posted by month: Jun 2026: 4, Jul 2026: 1, Aug 2026: 0, Sep 2026: 0, Oct 2026: 0, Nov 2026: 0.

Roles it sponsors

• DevOps Engineer (2)
• Platform Engineer (2)
• Product Manager (1)

Where it sponsors

• United Kingdom (5)

Skills its listings name most

• Production Engineering (4)
• API Design (2)
• Backend Engineering (2)
• Billing Infrastructure (2)
• Capacity Planning (2)
• CI/CD (2)
• Client SDK Development (2)
• Cloud Services (2)
• Compliance Execution (2)
• Concurrency (2)

Browse jobs by skill

Technologies mentioned in its listings

• Go
• gRPC
• Kubernetes
• Python
• Rust

Mentioned in listings

• Visa Sponsorship

Work model

• 5 not marked remote

Hiring activity

0 listings posted in the last 30 days (0 in the last 7), 0 in the 30 days before.

On The Stack (as of 2026-11-05)

• 5 of its 5 listings (100%) are marked as offering visa sponsorship, compared with 88% of all 2726 listings on The Stack.
• 98 companies have more listings on The Stack (out of 454 companies).

Frequently asked questions

Is Callosum hiring right now?

Callosum has 5 listings on The Stack Jobs, the most recent posted on 2026-07-07. Check each listing on Callosum 's site to confirm it is still open.

Where is Callosum hiring?

Callosum 's listings on The Stack are in United Kingdom.

Does Callosum offer remote work?

None of Callosum 's current listings on The Stack are marked remote.

Does Callosum offer visa sponsorship?

5 of Callosum 's 5 listings are marked as offering visa sponsorship, mostly DevOps Engineer, Platform Engineer, Product Manager roles in United Kingdom. Check each listing for the employer's eligibility rules.

What skills does Callosum ask for?

The skills its listings name most often: Production Engineering (4), API Design (2), Backend Engineering (2), Billing Infrastructure (2), Capacity Planning (2).

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