Software Engineer II (Flex)

• A hands-on engineer with expertise in at least one programming language. If your experience doesn't match our stack exactly, that's fine - we hire based on strong engineering fundamentals rather than specific languages
• Experience building or contributing to a variety of systems, ideally across different technologies
• Knowledge of modern engineering best practices, including test automation and continuous delivery
• A genuine passion for developing products that positively impact large numbers of people and the environment
• A collaborative mindset, with a love of working in teams to build features that deliver customer value
• Motivation to take ownership of products, from inception through to continuous improvement
• A strong belief in test automation, continuous delivery, and agile ways of working
• A proactive approach to learning, with a desire to deepen your expertise and broaden your skill set

What will set you apart

• A genuine interest in the energy transition and developing products that positively impact the environment.

This stage includes three sessions, usually scheduled separately, though we can accommodate completing them in a single day if you prefer:

• Pairing - A collaborative session where you'll work through a practical task with one of our engineers, focusing on problem-solving, clean code, and communication.
• System Design - Explores how you approach more complex problems, including designing scalable, reliable systems.
• Behavioural - Focuses on collaboration, problem-solving, and how you deliver value for customers, using real examples from your experience.

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. Leveraging Data, AI, and real-time decision-making we turn energy complexity into growth opportunities for our partners. By combining predictive algorithms with human-centred design, Kaluza makes clean energy dependable and affordable. 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 part of the Flex platform team, helping to build the systems that connect energy retailers, grid operators, and consumers to support a more flexible, dynamic energy system. Day to day, you'll design and deliver scalable features, from integrating technologies like electric vehicles to enabling customer offerings such as "Charge Anytime." You'll work closely with data scientists and backend engineers on core optimisation problems, while taking ownership of features from early idea through to ongoing improvement. Along the way, you'll write high-quality, well-tested code and contribute to a strong engineering culture, building software that has a real impact on decarbonising transport and home energy use at scale.