Software Engineer

Location: Bristol, London, Edinburgh, UK (hybrid, three days a week in the office)

Level: Engineer C2

Team: Engineering

Salary: 45,000 – 62,000 + discretionary bonus

Contract: Permanent

Reporting To: Software Engineering Manager

Please note: This role requires an existing right to work in the UK. We can’t offer visa sponsorship, but we review sponsorship role by role, so keep an eye on our careers site for future opportunities.

About Kaluza

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, 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 you'll do

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.

Responsibilities:

• Build and maintain backend services using modern technologies like TypeScript and Node.js.
• Learn to work with event-driven systems and cloud platforms (especially AWS).
• Collaborate with other engineers, product managers, and designers to develop customer-facing features.
• Write clean, maintainable code and participate in code reviews to grow your technical skills.
• Contribute to the ongoing development of services and systems, with support from your team.
• Work with databases (SQL or NoSQL) to manage and retrieve data.
• Take part in team discussions, stand-ups, and planning sessions to understand how we build at scale.
• Ask questions, seek feedback, and share what you’re learning to support a positive team environment.

Tech stack: Typescript, Node JS, Terraform, Gitactions, Kubernetes, Docker, AWS, Kafka, GraphQL

What you'll bring

Ideally, you'll have:

• Some hands-on experience writing backend code, ideally in TypeScript, or keen to learn it.
• A basic understanding of cloud technologies or interest in learning about platforms like AWS.
• Familiarity with databases and APIs, and a desire to build reliable software.
• A collaborative and open mindset, you're excited to learn from others and contribute to a team.
• A curiosity for how things work and a proactive attitude to improving your skills.
• Passion for building technology that solves real problems for users.
• Bonus: exposure to frontend development

Our Values

Five values guide how we work at Kaluza:

• Play to win: Collective pride in decarbonising energy at scale.
• Solve the real problem: Cutting through complexity to focus on real-world outcomes.
• Build trust every day: Consistency, transparency and doing what we say.
• Own the outcome: Full accountability, wins and setbacks, without ego.
• Go further together: Collaboration, respect and different perspectives.

Our Perks

• Time off and family: 26 days’ holiday, plus 26 weeks’ full pay for new parents with no qualifying service period
• Health and security: Private medical insurance with virtual GP, life assurance, pension scheme, free mortgage advice and eye tests
• Pay and flexibility: Discretionary bonus, a Flex Fund of 5% (of salary) to spend on the benefits you want most, retail discounts through Perks at Work
• Growth and setup: Personal learning budget, home office budget
• Climate: Furthr, our climate action app

Come as you are

We want to meet people from all walks of life. The more inclusive we are, the better our work will be, and we recognise talent on merit and potential. If you’re excited about the role but don’t tick every box, we’d still love to hear from you.

Find out more on our careers page and LinkedIn . Our Applicant Data Protection Policy is here .