Software Engineer II

• Build, maintain, and improve backend services using TypeScript.
• Contribute to event-driven systems that process data reliably and in near real time.
• Work closely with product managers, designers, and other engineers to deliver user-focused features.
• Write clean, well-tested code and take part in code reviews to uphold high engineering standards.
• Take ownership of well-defined services or components, with support from more experienced engineers.
• Work with SQL and NoSQL databases to store and retrieve data effectively.
• Help deploy and operate services on cloud platforms, particularly AWS and serverless infrastructure.
• Contribute positively to team culture through collaboration, knowledge sharing, and continuous learning.

Do you have experience in TypeScript?, * Professional experience developing backend applications.

• Experience with TypeScript, or strong experience in another language and a desire to work with TypeScript.
• Some experience or exposure to event-driven systems or message queues (e.g. Kafka, SQS).
• Familiarity with cloud environments, ideally AWS.
• Comfortable working with databases (SQL or NoSQL) and an understanding of basic trade-offs.
• A collaborative team player who communicates clearly and enjoys problem-solving with others.
• Curious, motivated, and keen to grow as an engineer.

The final stage consists of three interviews. These are usually scheduled across multiple sessions, though we can accommodate completing them in a single day if you prefer.

• Behavioural Interview Focuses on collaboration, problem-solving, and how you deliver value for customers, using real examples from your experience.

• System Design Interview Explores how you approach complex, large-scale problems, such as designing scalable, reliable, and secure systems.

• Pairing Interview A collaborative session where you'll work through a practical task with one of our engineers, focusing on problem-solving, clean code, and communication.

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

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.

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. 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 engineers building data-led and product-focused software at scale. We care deeply about engineering quality and collaboration, and we support each other in continuously improving how we build and operate our systems. In this role, you'll work on Kaluza's Energy Retail platform, a SaaS product that helps energy retailers operate more effectively and supports the decarbonisation efforts of Kaluza's customers. The platform is built with scalability and reliability in mind, and you'll contribute to systems that are used in production at meaningful scale. You'll focus primarily on building and improving backend services, working alongside experienced engineers who will support your development and growth. You'll collaborate closely with product and engineering partners to deliver reliable, well-designed solutions. Our tech stack evolves over time, but you can expect to work with technologies such as: TypeScript, Node.js, GraphQL, Kafka, AWS, Terraform, Docker, Kubernetes, and CI tooling.