Job title: Principal EngineerLocation: London / Bristol / Edinburgh - Hybrid Salary:  £116,000 - £153,000Reporting to: Director of Enterprise ArchitectureClosing Date: 19th August 2025Kaluza reimagines energy to bring net-zero within everyone’s reach. Our intelligent 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.<h3>What will I be doing?</h3>As a Principal Software Engineer at Kaluza, you will be the leading technical authority for a major global product area comprising multiple modules. You will lead innovation on some of the most complex, ambiguous, and large-scale solutions, aligning them with target architecture standards and contributing to the creation of a scalable platform.You’ll have a broad sphere of influence, enabling multiple teams and serving as a strategic partner to our architecture leadership team and our community of principal and staff engineers.Your impact will come mostly from 'hands-off' work; you’ll not be expected to write code day-to-day. But for some challenges, you may need to dive into code-level design or help build a proof-of-concept.<h3>About You</h3>You can:<ul><li>Architect modern distributed, cloud-based systems applying modern architecture and engineering practices in an enterprise software environment.</li><li>Shape and influence technical vision and product roadmaps to align with business goals.</li><li>Provide hands-on leadership, making appropriate technical choices to satisfy requirements.</li><li>Mentor and guide engineers in delivering autonomous, loosely coupled distributed systems with proven architectural principles and patterns.</li><li>Lead technical due diligence and make high-stakes decisions with confidence.</li><li>Deliver results, influence diverse audiences, and orchestrate cross-functional solutions spanning multiple product features.</li><li>Engage effectively with both technical teams and executive leaders.</li><li>Work independently and collaboratively, bringing strong opinions while respecting others, communicating openly, and maintaining self-awareness with a continuous growth mindset.</li></ul>What will set you apart<ul><li>Demonstrable experience in architecting solutions in complex business domains, particularly interface design and data modelling, ideally with experience in AWS and API design.</li><li>Proven track record delivering global B2B2C SaaS (energy or other mission‑critical industries).</li><li>Success driving adoption of modern engineering practices (e.g. DevOps, CI/CD).</li><li>Experience leading teams through significant changes in ways of working.</li><li>Ability to ramp up rapidly in new domains and technologies.</li></ul><h3>Kaluza Values</h3>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<a href="https://careers.kaluza.com/our-values"> values over on our careers site.</a><h3>From us you’ll get</h3><ul><li>Pension Scheme</li><li>Discretionary Bonus Scheme</li><li>Private Medical Insurance + Virtual GP</li><li>Life Assurance</li><li>Access to Furthr - a Climate Action app</li><li>Free Mortgage Advice and Eye Tests</li><li>Perks at Work - access to thousands of retail discounts</li><li>5% Flex Fund to spend on the benefits you want most</li><li>26 days holiday</li><li>Flexible bank holidays, giving you an additional 8 days which you can choose to take whenever you like</li><li>Progressive leave policies with no qualifying service periods, including 26 weeks full pay if you have a new addition to your family </li><li>Dedicated personal learning and home office budgets</li><li>And more…</li></ul>Even better? You’ll have access to these benefits from day 1 when you join.<h3>We want the best people</h3>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<a href="http://kaluza.com/"> Kaluza</a> on our<a href="https://careers.kaluza.com/"> careers page</a> and<a href="https://www.linkedin.com/company/kaluza/"> LinkedIn</a>.You can also find our Applicant Data Protection Policy<a href="https://kaluza-careers.cdn.prismic.io/kaluza-careers/Z5umd5bqstJ9-DZw_2024ApplicantDataProtectionNotice.pdf"> here</a>.

Kaluza is the intelligent energy platform enabling the world&rsquo;s largest energy companies to lead the way in the energy transition. From revolutionising energy retail operations to smart electric vehicle charging, our software is empowering energy suppliers to deliver market-leading experiences for their customers and drive decarbonisation.&nbsp;
Launching in 2019, we&rsquo;ve grown rapidly to over 400 employees across the UK, Portugal and the US. We pride ourselves on technical excellence and building a platform that has a real, positive impact in a fast-evolving industry.&nbsp;
We&rsquo;re on the lookout for talented problem solvers, who are determined to make a difference to the world. Sound like you? Find out more about life at Kaluza&nbsp;<a class="body-text-link hyperlink" href="https://careers.kaluza.com/life-at-kaluza">here</a>.

Principal Engineer

Job title: Principal EngineerLocation: London / Bristol / Edinburgh - Hybrid&nbsp;Salary: &nbsp;£116,000 - £153,000Reporting to: Director of Enterprise ArchitectureClosing Date: 19th August 2025Kaluza reimagines energy to bring net-zero within everyone’s reach. Our intelligent 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.&nbsp;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.&nbsp;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.<h3>What will I be doing?</h3>As a Principal Software Engineer at Kaluza, you will be the leading technical authority for a major global product area comprising multiple modules. You will lead innovation on some of the most complex, ambiguous, and large-scale solutions, aligning them with target architecture standards and contributing to the creation of a scalable platform.You’ll have a broad sphere of influence, enabling multiple teams and serving as a strategic partner to our architecture leadership team and our community of principal and staff engineers.Your impact will come mostly from 'hands-off' work; you’ll not be expected to write code day-to-day. But for some challenges, you may need to dive into code-level design or help build a proof-of-concept.<h3>About You</h3>You can:<ul><li>Architect modern distributed, cloud-based systems applying modern architecture and engineering practices in an enterprise software environment.</li><li>Shape and influence technical vision and product roadmaps to align with business goals.</li><li>Provide hands-on leadership, making appropriate technical choices to satisfy requirements.</li><li>Mentor and guide engineers in delivering autonomous, loosely coupled distributed systems with proven architectural principles and patterns.</li><li>Lead technical due diligence and make high-stakes decisions with confidence.</li><li>Deliver results, influence diverse audiences, and orchestrate cross-functional solutions spanning multiple product features.</li><li>Engage effectively with both technical teams and executive leaders.</li><li>Work independently and collaboratively, bringing strong opinions while respecting others, communicating openly, and maintaining self-awareness with a continuous growth mindset.</li></ul>What will set you apart<ul><li>Demonstrable experience in architecting solutions in complex business domains, particularly interface design and data modelling, ideally with experience in AWS and API design.</li><li>Proven track record delivering global B2B2C SaaS (energy or other mission‑critical industries).</li><li>Success driving adoption of modern engineering practices (e.g. DevOps, CI/CD).</li><li>Experience leading teams through significant changes in ways of working.</li><li>Ability to ramp up rapidly in new domains and technologies.</li></ul><h3>Kaluza Values</h3>Here at Kaluza we have five core values that guide us as a business:&nbsp;We’re on a mission, We build together, We’re inclusive, We get it done, We communicate with purpose.Read more about our<a href="https://careers.kaluza.com/our-values"> values over on our careers site.</a><h3>From us you’ll get</h3><ul><li>Pension Scheme</li><li>Discretionary Bonus Scheme</li><li>Private Medical Insurance + Virtual GP</li><li>Life Assurance</li><li>Access to Furthr - a Climate Action app</li><li>Free Mortgage Advice and Eye Tests</li><li>Perks at Work - access to thousands of retail discounts</li><li>5% Flex Fund to spend on the benefits you want most</li><li>26 days holiday</li><li>Flexible bank holidays, giving you an additional 8 days which you can choose to take whenever you like</li><li>Progressive leave policies with no qualifying service periods, including 26 weeks full pay if you have a new addition to your family&nbsp;</li><li>Dedicated personal learning and home office budgets</li><li>And more…</li></ul>Even better? You’ll have access to these benefits from day 1 when you join.<h3>We want the best people</h3>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<a href="http://kaluza.com/"> Kaluza</a> on our<a href="https://careers.kaluza.com/"> careers page</a> and<a href="https://www.linkedin.com/company/kaluza/"> LinkedIn</a>.You can also find our Applicant Data Protection Policy<a href="https://kaluza-careers.cdn.prismic.io/kaluza-careers/Z5umd5bqstJ9-DZw_2024ApplicantDataProtectionNotice.pdf"> here</a>.

Principal Engineer

About the Job

About the Company

Kaluza

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