Job title: Engineer I
Location: London / Bristol / Edinburgh - Hybrid
Salary: £40,500 - £55,000
Reporting to: Software Engineering Manager
Kaluza reimagines energy to bring net-zero within everyone’s reach. The Kaluza Platform enables energy utilities to unlock the full value of a radically changing energy system and propel us to a future where renewable energy is sustainable, affordable and accessible for all.
From automating and simplifying core operations including billing to create a lower-cost, higher-engagement experience, to optimising energy usage across smart devices in the home, we turn tough challenges into win-win-win outcomes for customers, suppliers and the energy system.
At Kaluza we embrace a flexible, hybrid work model that balances autonomy with the power of in-person connection. Many of our teams find value in coming together regularly to collaborate, strengthen relationships, and accelerate progress. We’re focused on shaping thoughtful, team-driven approaches that support both business impact and individual well-being.
We also prioritise meaningful company-wide gatherings like our annual conference and end-of-year celebrations, that bring us together to align, connect, and celebrate.
As we're scaling rapidly, we have a number of opportunities available across different teams and levels. The specific role you move forward with will be shaped as we progress through the interview process — allowing us to assess where your experience can have the greatest impact, with the right support around you to enable both your growth and that of the team. Our Talent Acquisition team will guide you through the details as we go.
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
- 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.
About You
- 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
Why might this role not suit you?
We are going through a period of significant evolution which is exciting and with it brings lots of opportunity and challenging work, which is not for everyone. To be successful in this role, you will be excellent at operating in ambiguous, changing environments, balancing multiple priorities simultaneously and get enjoyment from making the complex, simple.
Our Software Engineering Interview Process
Initial call with our Talent Acquisition team (30 minutes)
This short call is designed to tell you more about Kaluza and the specific team you’ll be joining, as well as to ensure that the role is the right fit for you
First stage interview (1 hour minutes)
This interview will be with a hiring manager from one of our engineering teams, this interview will cover both mindset and technical questions. We will also incorporate a 15 coding exercise, so have your screen ready to do some coding
Final Interview Loop (2 hours)
Two hours sounds like a long time, but we don’t expect all of these to be completed across one day, but we can support that if you so wish, the three sessions cover the following:
Behavioural - We use behavioural interviews to understand how you collaborate, solve problems, and build value for customers through real-world examples.
Pairing - Our pairing interview focuses on problem-solving, clean code, and real-time collaboration — you'll work through a practical task with one of our engineers.
Kaluza Values
Here at Kaluza we have five core values that guide us as a business:
We’re on a mission, We build together, We’re inclusive, We get it done, We communicate with purpose.
Read more about our values over on our careers site.
From us you’ll get
- 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 policies with no qualifying service periods, including 26 weeks full pay if you have a new addition to your family
- Dedicated personal learning and home office budgets
- Flexible working — we trust you to work in a way that suits your lifestyle
- And more…
Even better? You’ll have access to these benefits from day 1 when you join.
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.
