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.