About Joulen The energy system is changing fast. As renewable generation and electrification spread, flexibility becomes more valuable, and assets such as home batteries, commercial and industrial batteries, electric vehicles and grid-scale storage can all help balance supply and demand. Capturing that value takes direct market access, sophisticated forecasting and real-time optimisation. Joulen provides all three. We trade directly in energy markets and use our platform to forecast tradable volumes and find the strongest opportunity in any given period, so flexible assets earn more than they otherwise would. We do this with installers, energy retailers and OEMs, who gain a stronger customer proposition and a new revenue stream, while asset owners see better returns and the grid gets more flexibility. The role As a Principal Software Engineer you are the senior technical authority for one or more of Joulen's product domains, sitting between Senior Engineer and Head of Engineering on our Software Engineer career track. You set the design principles, delivery strategy and operational standards for your domain, and you work with the other Principals
Principal Software Engineer in Belfast employer: Joulen
Joulen is an exceptional employer located in Belfast, offering a dynamic work environment where finance plays a crucial role in the rapidly growing energy flexibility sector. Employees enjoy competitive salaries, generous leave policies, and comprehensive benefits including study support for professional qualifications, all while being part of a collaborative team that values autonomy and personal growth. With a strong focus on employee development and a culture that encourages innovation and direct feedback, Joulen provides a unique opportunity to shape the future of energy trading and settlement processes.
