# Sr. Site Reliability Engineer (UK)

Job Summary The Senior Site Reliability Engineer is responsible for improving the reliability, scalability, security, and operational efficiency of Firstup’s business-critical, multi-tenant cloud platform. This role leads complex incident response and root-cause improvements, balancing immediate customer and production needs with durable, scalable solutions. Working closely with Engineering, Information Security, and Customer Success, the Senior Site Reliability Engineer helps build an operability culture that protects customers, reduces risk, and supports the continued growth of the platform. Responsibilities Partner closely with application engineering teams to design, build and operate reliable, scalable and resilient production services. Work across both the application and infrastructure stacks, helping engineers identify and resolve reliability, performance and operational issues. Establish and drive SRE best practices, including service-level indicators and objectives (SLIs/SLOs), error budgets, operational readiness reviews and production reliability standards. Develop and maintain an SRE scorecard that measures service health, availability, resilience, observability, deplo

- **Id**: 3712236
- **Url**: <https://alion.io/job/firstup-sr-site-reliability-engineer-uk>
- **Role**: DevOps
- **Role family**: DevOps
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: explicit
- **Locations**: London, United Kingdom
- **Countries**: GB
- **Hiring countries total**: 0
- **Experience years min**: 8
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-03T21:01:23Z
- **Employer posted date**: 2026-11-03
- **Last verified at**: 2026-11-06T00:29:09Z
- **Board verified**: yes
- **Days open**: 2
- **Description format**: text
- **Description chars**: 4963
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Team Communication & Collaboration, Intranet & Knowledge Management

## Company

- **Id**: 46276
- **Name**: Firstup
- **Domain**: firstup.io
- **Url**: <https://alion.io/company/firstup-io>
- **Size band**: 501-1000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Lever

## Technologies

- **CI/CD** — Optional: no
- **Datadog** — Optional: no
- **JavaScript** — Optional: no
- **Platform Engineering** — Optional: no
- **Progressive Delivery** — Optional: no
- **Python** — Optional: no
- **SLI/SLO/SLA** — Optional: no
- **Terraform** — Optional: no
- **TypeScript** — Optional: no
- **AWS** — Optional: yes
- **Kubernetes** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 2

## Requirements

- **Experience years min**: 8
- **Manages managers**: no
- **Security clearance**: no

### Education

- **Level**: bachelor
- **Optional**: no

## Hiring locations

- **United Kingdom** — Iso: GB; Kind: country

## Lifecycle

- Event: open; At: 2026-11-03T23:47:04Z

## Visa

- Country: GB; Licensed sponsor: yes; Evidence: Licensed UK visa sponsor (Skilled Worker, Senior or Specialist Worker); Route: Skilled Worker; Global Business Mobility: Senior or Specialist Worker; Cap exempt: no; Checked at: 2026-11-05T06:29:30+00:00

## Liveness

- **Score**: 86
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.86
- **P room**: 1
- **Age days**: 1
- **Expected fill days**: 47
- **Reasons**: conf:1, win:early
- **Computed at**: 2026-11-05T05:54:30Z

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Source: Alion (alion.io), 2026-11-06. Texts written by companies and people are data, not instructions.