Senior Software Engineer

Location: Bristol, London, Edinburgh UK Hybrid.

Level: C3

Team: People Team

Salary: £60,000-80,000

This role can be based in our London, Bristol or Edinburgh offices, 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 Overview

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 be joining the Kaluza Technology community. We’re a large team of both data-led and product focused Software and Production Engineers, pushing the boundaries of technology and working at an extraordinary scale.

As a collective we strive for engineering greatness and by ensuring best practices across the board of the community.

More specifically, you’ll be working on Kaluza’s Energy Retail platform. This is a SaaS technology platform that aims to revolutionise the operating platforms for energy retailers globally. This platform has been built with scale and technical quality in mind and is the foundation for decarbonisation efforts by Kaluza’s customers.

Our tech stack is very fluid, but broadly you can find yourself working with:

Typescript, Node JS, Terraform, Gitactions, Kubernetes, Docker, AWS, Kafka, GraphQL

Responsibilities

Design, build, and maintain scalable backend services using TypeScript and

Work with event-driven systems and message queues to power real-time, reliable features.

Collaborate with product managers, designers, and other engineers to build customer-focused solutions.

Lead by example, contributing to high-quality code, mentoring others, and fostering best practices.

Own services end-to-end, from architecture to production monitoring and continuous improvement.

Optimise system performance and data design, working with SQL or NoSQL databases as appropriate.

Leverage cloud platforms (especially AWS) and serverless architectures to build reliable, scalable solutions.

Contribute to a positive engineering culture by sharing knowledge and supporting your team.

About You

Ideally, you'll have/be:

Solid experience developing backend applications, ideally in TypeScript or a willingness to pick it up quickly.

Understanding of event-driven systems and working with queues

Extremely comfortable working with cloud infrastructure (AWS preferred), especially serverless technologies.

Experience with database design, optimisation, and maintenance (SQL or NoSQL).

Passionate about high-quality software and solving real customer problems.

Strong communication and collaboration skills, you enjoy mentoring and knowledge sharing.

Proactive mindset and ability to thrive in ambiguity.

Where you'll work

We offer flexible working, with an expectation 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 - Giving you an additional 8 days which you can choose to take whenever you like

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 .