Site Reliability Engineer

Job Description

Closing Date: 06/01/26

Possible Office Locations: Belfast, Birmingham, Bristol, London, Manchester

Why this job matters

As a Site Reliability Engineer (SRE), you will play a critical role in ensuring BT delivers exceptional service performance, reliability, and availability across its digital platforms. In a fast-paced, cloud-driven AI environment where customers expect seamless experiences, this position enables scalable, fault-tolerant, and cost-effective solutions through cross-team collaboration, automation, monitoring, and resilience strategies. By minimising downtime, reducing operational risk, and accelerating innovation, you will safeguard BT’s reputation for reliability while empowering the business to adapt quickly to emerging technologies and deliver consistent value to customers worldwide.

What you’ll be doing

• Implement and optimise CI/CD pipelines, automation frameworks, and infrastructure-as-code solutions using AWS, GitOps, and container technologies.
  
• Design, develop, and troubleshoot large-scale distributed systems across on-prem and cloud environments, ensuring reliability and scalability.
  
• Lead performance and scale testing, monitoring, and analysis to improve system stability, security, and efficiency.
  
• Drive automation initiatives to eliminate manual toil, reduce detection and resolution times, and enhance operational resilience.
  
• Proactively identify and mitigate risks, perform root cause analysis, and implement preventive measures following incidents.
  
• Champion best practices in Site Reliability Engineering, mentor team members, and share knowledge on emerging trends and technologies.
  
• Collaborate across organisational boundaries to deliver improvements aligned with broader SRE initiatives.

Experience you'll have

Mandatory:

• A deep understanding of full-stack monitoring solutions, such as Dynatrace, to ensure current end-to-end performance and trends of owned CDO Applications.
• Strong proficiency in one or more programming languages (e.g. Java, Python).
• Experience with cloud platforms (AWS, Azure, or GCP).
• Solid understanding of software architecture, design patterns, and microservices.
• Familiarity with CI/CD tools and DevOps practices.

Desirable:

• AIOps fundamentals (cross-domain telemetry ingestion, event correlation, topology/context building, and remediation augmentation).
• Agentic/autonomous observability skills (using intelligent agents to detect anomalies, correlate signals, and trigger guarded remediations to cut MTTR).
• AI-assisted alerting & noise reduction (designing contextual, business impact aware alerts; prioritisation via ML).

The skills you’ll need

TroubleshootingInfrastructure ConfigurationService AssuranceApplication Performance Monitoring & AlertingComputer NetworkingSystem AdministrationProgramming/ScriptingArtificial Intelligence Operations (AIOps)Server ArchitectureCloud ComputingContinuous Integration/Continuous Deployment Automation & OrchestrationSystems IntegrationProject/Programme ManagementIncident ManagementDecision MakingGrowth MindsetInclusive Leadership

Benefits

• An annual on-target bonus of 10% (personal and company multipliers).
  
• BT Pension scheme: minimum 5% employee contribution, BT contribution 10%.
  
• Exclusive colleague discounts on our latest and greatest BT broadband packages.
  
• 50% off EE mobile pay monthly or SIM only plans, and 50% discount for friends and family on EE SIM only plans.
  
• Discounted EE TV, including TNT Sport and the NOW Entertainment membership.
  
• There’s also great support for working parents, including pay whilst on maternity, adoptive, and paternity leave.
  
• 25 days annual leave (not including bank holidays), increasing with service.
  
• Volunteering days, so you can give back to your local community.
  
• Brand new electric vehicle salary sacrifice arrangement, known as ‘My EV’.

Our leadership standards

Looking in:
Leading inclusively and Safely
I inspire and build trust through self-awareness, honesty and integrity.
Owning outcomes
I take the right decisions that benefit the broader organisation.

Looking out:
Delivering for the customer
I execute brilliantly on clear priorities that add value to our customers and the wider business.
Commercially savvy
I demonstrate strong commercial focus, bringing an external perspective to decision-making.

Looking to the future:
Growth mindset
I experiment and identify opportunities for growth for both myself and the organisation.
Building for the future
I build diverse future-ready teams where all individuals can be at their best.

About us

BT Group was the world’s first telco and our heritage in the sector is unrivalled. As home to several of the UK’s most recognised and cherished brands – BT, EE, Openreach and Plusnet, we have always played a critical role in creating the future, and we have reached an inflection point in the transformation of our business.

Over the next two years, we will complete the UK’s largest and most successful digital infrastructure project – connecting more than 25 million premises to full fibre broadband. Together with our heavy investment in 5G, we play a central role in revolutionising how people connect with each other.

While we are through the most capital-intensive phase of our fibre investment, meaning we can reward our shareholders for their commitment and patience, we are absolutely focused on how we organise ourselves in the best way to serve our customers in the years to come. This includes radical simplification of systems, structures, and processes on a huge scale. Together with our application of AI and technology, we are on a path to creating the UK’s best telco, reimagining the customer experience and relationship with one of this country’s biggest infrastructure companies.

Change on the scale we will all experience in the coming years is unprecedented. BT Group is committed to being the driving force behind improving connectivity for millions and there has never been a more exciting time to join a company and leadership team with the skills, experience, creativity, and passion to take this company into a new era.

A FEW POINTS TO NOTE:

Although these roles are listed as full-time, if you’re a job share partnership, work reduced hours, or any other way of working flexibly, please still get in touch.

We will also offer reasonable adjustments for the selection process if required, so please do not hesitate to inform us.

DON'T MEET EVERY SINGLE REQUIREMENT?

Studies have shown that women and people who are disabled, LGBTQ+, neurodiverse or from ethnic minority backgrounds are less likely to apply for jobs unless they meet every single qualification and criteria. We're committed to building a diverse, inclusive, and authentic workplace where everyone can be their best, so if you're excited about this role but your past experience doesn't align perfectly with every requirement on the Job Description, please apply anyway - you may just be the right candidate for this or other roles in our wider team.