Principle Site Reliability Engineer in London

We’re seeking passionate Principal Site Reliability Engineers who want to grow their career and delight customers through a hybrid of project and foundational activities. We take a modern approach of working collaboratively internally and externally to achieve high levels of satisfaction both for our clients and ourselves collectively. We achieve this through focused groups of technical people, known as Pods, coming together to deliver and maintain services to UK clients. The strength of our Pods lies within our people, fostered by a supportive team culture, and our ideal candidate would thrive in such an environment.

Hybrid working: The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

Your Role: As an integral part of a Cloud Pod, you’ll have fantastic opportunities to develop both yourself and our collective capabilities as you progress both project and foundational requirements with other likeminded experienced SREs and Cloud Engineers. As part of the team, you’ll be empowered to:

• Build and maintain scalable platforms with a high degree of focus on technical reuse, standardisation and blueprints; think “GitOps” not “ClickOps”.
• Fully embrace Agile ways of working and feel invested in our customer’s outcomes as we group around activities in agile sprints, and within defined error budgets to ensure reliability and customer success.
• Continue to strengthen and bolster your own existing capabilities in site reliability through a mix of professional training, certifications, and experiences, as well as mentoring, developing the skills of others, and promoting best practices across teams.
• Contribute to evolving Capgemini offerings, shaping solutions that deliver value for clients and advance our cloud‑native strategy.

Successful candidates will be supporting Critical National Infrastructure, and as part of this be part of a regular on‑call rota. You can bring your whole self to work. At Capgemini building an inclusive future is part of everyday life and will be part of your working reality. We have built a representative and welcoming environment, for everyone.

Your skills and experience: Leadership in SRE operations with strong expertise in OpenShift and Kubernetes; certifications like CKA or CKS are a plus. Systems Architecture experience in complex multi‑cloud or hybrid environments. Proficiency in service mesh technologies such as Istio, and hands‑on experience with EDB Postgres for enterprise‑grade databases. Deep knowledge of observability stacks (Prometheus, Grafana, Loki, LogiStack, Tempo) and Infrastructure as Code (IaC) using tools like Kustomize or Helm; scripting skills in Bash and Python. CI/CD pipeline management with GitOps principles using Tekton, ArgoCD, or FluxCD; strong automation and consistency focus. Mentorship and best practices promotion, plus familiarity with Red Hat ACM/ACS and networking tools like Submariner.

We are a Disability Confident Employer. Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who declare they have a disability and meet the minimum essential criteria for the role. Please opt in during the application process.

Your security clearance: To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance. To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements. Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality. Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

Make it real – what does it mean for you? You’d be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions. To help support wellbeing we have trained ‘Mental Health Champions’ across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.

You will be joining one of the World’s Most Ethical Companies®, as recognised by Ethisphere® for 13 consecutive years. We live our values by making ethical business choices every day. Working ethically is at the centre of our culture at Capgemini, meaning you will be helping to create a future we can all be proud of.

You will reimagine what’s possible: creating value for the world’s leading organisations through technology to build a sustainable, more inclusive future. You will work with a range of clients all with a unique set of business, technological and societal ambitions, which will make a real impact across the UK. Capgemini. Make it real.

Why you should consider Capgemini: Growing clients’ businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you’ll join a thriving company and become part of a collective of free‑thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what’s possible. It’s why, together, we seek out opportunities that will transform the world’s leading businesses, and it’s how you’ll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you’ll build the skills you want. You’ll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini: Capgemini is an AI‑powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology, and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of 420,000 team members in more than 50 countries. We deliver end‑to‑end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2024 global revenues of €22.1 billion. Make it real.