Site Reliability Engineer

Site Reliability Engineer £72,000 GBP Hybrid WORKING

Location:

Leeds, Yorkshire and the Humber - United Kingdom Type:
Permanent An exciting opportunity is available for a Site Reliability Engineer (SRE) to join a growing engineering team supporting mission-critical applications and services within the UK National Security sector. This role combines software development, systems engineering, cloud infrastructure and operational expertise to improve the availability, performance, scalability and resilience of essential digital services. Rather than relying on traditional manual operations, the successful candidate will use automation, monitoring and engineering best practices to reduce repetitive tasks, prevent recurring incidents and improve service reliability.

Working alongside product and Dev Ops teams, the Site Reliability Engineer will identify technical improvements, troubleshoot complex issues and help ensure that critical applications remain stable and dependable. The role offers the opportunity to work with modern technologies, contribute to a wider SRE community and deliver solutions that have a meaningful impact across National Security environments. The position also provides opportunities to participate in local community engagement and outreach initiatives, helping to develop technology and cyber skills across the region.

Key Responsibilities Maintain and improve the availability, performance and stability of essential services supporting mission-critical applications. Apply software engineering and systems engineering principles to automate operational processes and reduce manual intervention. Identify opportunities to eliminate repetitive support activities, improve efficiency and prevent recurring incidents. Work closely with product and development teams to promote reliable system design, engineering best practices and operational readiness.

Monitor service health and instrument applications where additional monitoring and observability are required. Analyse monitoring data and service metrics to demonstrate improvements in system reliability and operational performance. Diagnose and resolve complex application and infrastructure issues, including incidents that result in service outages. Troubleshoot problems across multiple layers of the technology stack, including applications, databases, operating systems and cloud infrastructure.

Improve the scalability, resilience and fault tolerance of applications and the infrastructure on which they run. Support containerised applications and microservices architectures. Contribute to the development and improvement of automation, deployment processes and operational tooling. Participate in Agile delivery teams and collaborate with colleagues across the wider Dev Ops and Site Reliability Engineering community. Keep up to date with emerging technologies and identify opportunities to introduce tools and practices that improve service delivery.

A key principle of the role is to prioritise engineering and automation over repetitive manual support. Operational support and incident-related activities should account for no more than 50% of the SRE team's time, with excess support demand returned to the relevant product team until workloads are back within this limit. Essential Skills and Experience Candidates should bring experience across a range of the following areas:
Software development:
Experience developing software using Java and web technologies, such as JavaScript and HTML. Operating systems and scripting:
Familiarity with Linux and Windows command-line environments, including Bash and Power Shell. Cloud infrastructure:
Hands-on experience with cloud platforms such as AWS, Microsoft Azure or Open Stack. Monitoring and…