Site Reliability Engineer

Job title: Platform Engineer (Senior level)

Location: London or Bristol (Including Hybrid)

Salary: £56,000 - £84,000

Team: Platform Engineering

Reporting To: Engineering Manager

This role is based in the UK and requires an existing right to work in the UK. At this time, we are not able to offer visa sponsorship for this role. We are committed to building a diverse, global team and our sponsorship policy is evaluated on a role-by-role basis. We encourage you to keep an eye on our careers site to stay informed about future opportunities where we are able to offer visa sponsorship.

Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination. We help energy companies overcome today’s challenges while accelerating the shift to a clean, electrified future.

Our platform orchestrates millions of real-time decisions across homes, devices, markets and grids. By combining predictive algorithms with human-centred design, Kaluza makes clean energy dependable, affordable and adaptive to everyday life.

With teams across Europe, North America, Asia and Australia, and a joint venture with Mitsubishi Corporation in Japan, we power leading companies including OVO, AGL and ENGIE, as well as innovators like Volvo and Volkswagen.

What will I be doing?

You’ll play a pivotal role in evolving and elevating our internal developer platform to empower our software teams. Beyond day-to-day platform engineering, you'll take ownership of technical decisions, drive best practices across teams, eliminate complex infrastructure toil, reinforce enterprise security safeguards, and optimize cloud operations at scale.

• Engineering Foundations: Design and build a scalable, reliable, and developer-friendly platform that sets the standard for seamless software development and operations.

• Automation & Tooling: Drive self-service tooling and abstractions to hide platform complexity from developers, drastically improving developer experience and team velocity.

• Infrastructure as Code: Lead the use of Terraform, Helm, and Crossplane to automate provisioning and champion GitOps best practices across all cloud infrastructure.

• Monitoring & Observability: Establish robust monitoring, logging, and tracing foundations in close collaboration with the wider Site Reliability Engineering function.

• Security & Reliability: Embed automated security controls, ensure compliance, and participate in the out-of-hours on-call rota to troubleshoot and solve complex, systemic issues.

• Technical Leadership & Collaboration: Mentor engineers in the team, foster strong relationships with internal stakeholders to coordinate technical upgrades, and hold service providers accountable.

About You

Ideally you’ll have:

• Strong experience designing, building, and operating production applications at scale.

• Excellent technical leadership, communication, and collaboration skills with a passion for mentoring others.

• Deep expertise with cloud platforms like AWS (preferred), Google Cloud, or Azure.

• Hands-on experience architecting, managing, and maintaining production Kubernetes clusters.

• A deep understanding of distributed systems and resiliency patterns.

• Proven expertise with CI/CD pipelines, GitOps patterns, and Infrastructure as Code technologies.

Where you'll work

We offer flexible working, with a requirement of 3 days a week in the office. This gives us the best of both: real time together to collaborate and build relationships, with the flexibility to work in the way that suits you best the rest of the week.

Kaluza Values

Here at Kaluza we have five core values that guide us as a business:

Play to win, Solve the real problem, Build trust every day, Own the outcome, Go further together.

Our Perks

• Pension Scheme

• Discretionary Bonus Scheme

• Private Medical Insurance + Virtual GP

• Life Assurance

• Access to Furthr - a Climate Action app

• Free Mortgage Advice and Eye Tests

• Perks at Work - access to thousands of retail discounts

• 5% Flex Fund - to spend on the benefits you want most

• 26 days holiday

• Flexible Bank Holidays

• Progressive Leave Policy - With no qualifying service periods, including 26 weeks full pay if you have a new addition to your family

• Personal Learning Budget - Upskill, learn and grow!

• Home Office Budget

• And more!

We want the best people

We’re keen to meet people from all walks of life — our view is that the more inclusive we are, the better our work will be. We want to build teams which represent a variety of experiences, perspectives and skills, and we recognise talent on the basis of merit and potential.

We understand some people may not apply for jobs unless they tick every box. But if you're excited about joining us and think you have some of what we're looking for, even if you're not 100% sure, we'd still love to hear from you.

Find out more about working in Kaluza on our careers page and LinkedIn.

You can also find our Applicant Data Protection Policy here.