This hybrid role offers a great balance of home and office working. You'll join your colleagues in your local office at least 2 days a week. Please note: there is an on-call rota and you will be required to support 24 x 7 callout cover.

Overview As the UK's largest fibre-only network and its only proven wholesale challenger, CityFibre is busy setting new standards for what digital infrastructure can and should be. Our network is greener, more reliable and ready for the future. The products we provide over it lead the market on speed, value and service, helping businesses to innovate and communities to benefit from a stronger digital foundation.

Joining us as a Site Reliability Engineer, you’ll embed reliability into the design, build, and operation of CityFibre's core platforms and services. You’ll be part of our Platform team, working with engineering squads to improve performance, automation, and service ownership. You’ll apply SRE principles to ensure our systems are reliable, scalable, and secure—supporting the technology that powers our business. You’ll receive a competitive salary, a performance-related bonus, and a range of benefits to support you across financial, physical and mental wellbeing.

Responsibilities

Design for reliability and scalability from the outset

Implement monitoring, logging, and alerting systems

Automate deployments and operational tasks

Lead incident response and post-incident reviews

Define and maintain service level objectives (SLOs)

Support disaster recovery and resilience testing

Support 24x7 on-call cover as required

Qualifications and Experience

Experience with AWS and infrastructure as code

Familiarity with CI/CD pipelines and observability tools

Understanding of agile methodologies and event-driven architecture

PHP or Python development experience

Willingness to support 24x7 callout cover

Benefits

Competitive salary and a performance-related bonus

25 days annual leave

Gifted day off on your birthday

A day off to support a charity or organisation of choice

Range of wellbeing and savings initiatives including private medical insurance

Supportive family-friendly and menopause policies

We are a Times Top 50 Employer for Gender Equality, endorsed by WORK180, and a partner of Diversifying. We have pledged our commitment to the Armed Forces Gold Covenant and are a Disability Confident Leader. We are committed to ensuring that our people’s voices are heard and that everyone feels a sense of belonging at CityFibre. If you’d like to explore our culture and values, check out The CityFibre Way.

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