# Platform Site Reliability Engineer - Member of Technical Staff at Callosum

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> Responsibilities: - Own end-to-end operational health of the

- **Company:** Callosum (https://jobs.trythestack.co/companies/callosum)
- **Location:** United Kingdom
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Salary:** GBP 101,000–192,000 per year (as stated by the employer)
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Site Reliability Engineering, Production Engineering, Observability, Container Orchestration, Infrastructure-as-Code, CI/CD, Incident Response, Capacity Planning, SLO Definition, Compliance Execution, Monitoring, Alerting
- **Posted by employer:** 2026-06-16
- **Added to The Stack:** 2026-06-17
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/callosum/6fa6e6cd-f7be-4853-9cb5-18856d510565 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/platform-site-reliability-engineer-member-of-technical-staff-callosum-

## About the role

Responsibilities:
- Own end-to-end operational health of the production platform: define SLOs, monitoring, alerting and observability.
- Run and improve on-call processes: create runbooks, lead incident response, conduct blameless postmortems and ensure follow-through.
- Lead capacity planning and operational strategy for heterogeneous compute backends to handle large-scale concurrent traffic.
- Define "production-grade" standards and build reliability practice for a fast-growing platform serving real customer traffic.
- Collaborate closely with platform, hardware and orchestration teams to expose diverse compute backends reliably.

Requirements:
- Strong SRE or production-engineering background running customer-facing systems at scale.
- Experience defining and operating SLOs, monitoring pipelines, alerting and incident response playbooks.
- Proven capacity planning and performance tuning experience for high-concurrency services across diverse infrastructure.
- Hands-on familiarity with container orchestration, observability tooling and infrastructure-as-code practices.
- Strong collaboration skills and a bias for building durable operational systems rather than temporary fixes.

## Responsibilities

Own the end-to-end operational health of the production platform, including SLOs, observability, and capacity planning across heterogeneous compute backends. Build the reliability practice and collaborate with hardware and orchestration teams to ensure stable service delivery.

## Requirements

Requires a strong SRE or production engineering background managing large-scale customer-facing systems. Proficiency in modern operational tooling, container orchestration, and experience driving incident response improvements are essential.

## FAQ

- **Is this Platform Site Reliability Engineer - Member of Technical Staff role still open?** It was posted on 2026-06-16. Listings more than 30 days old may no longer be active, so check Callosum 's site before applying.
- **Does Callosum  offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Callosum 's site.
- **Where is this role located?** The listing gives the location as United Kingdom. It is marked on-site.
- **What is the salary for this role?** The listing states a salary of GBP 101,000–192,000 per year.
- **What skills does this role ask for?** The listing names: Site Reliability Engineering, Production Engineering, Observability, Container Orchestration, Infrastructure-as-Code, CI/CD, Incident Response, Capacity Planning, SLO Definition, Compliance Execution, Monitoring, Alerting.

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## Notes for agents

- Apply on the employer's page (https://jobs.ashbyhq.com/callosum/6fa6e6cd-f7be-4853-9cb5-18856d510565). The Stack does not take applications.
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