Janne Happonen is Director, Flexibility Growth at Fortum, where he leads the development of new business opportunities in energy flexibility across both the supply and demand side. His work sits at the intersection of the energy transition, customer electrification, and emerging technologies that enable a more flexible and resilient energy system. Previously, Janne founded Fortum Spring, an internal startup focused on demand response aggregation. Today, Fortum Spring's technology and products form the backbone of Fortum's flexibility services offering across multiple markets. He is passionate about turning market and technology shifts into scalable business models that accelerate the clean energy transition.