Finnish engineering.
Built from the ground up.
Superstream was born from a simple conviction: that the best battery systems hadn't been built yet. Our team spent years developing electric marine vessels, pushing performance and reliability into territory where no commercial product could follow. So they built their own solutions — from first principles, with no shortcuts.
What started as engineering innovation is now a growing company. Superstream develops, designs and manufactures advanced battery systems in Finland — bringing the highest standards of quality and reliability to customers around the world. We're in the building phase, and the work we do now will define what we become.
“We didn't set out to build a battery company. We set out to build something that worked — and the battery was the only way to get there.”
— Superstream core team
To develop, design and manufacture battery systems of the highest quality — in Finland, for the world. We believe great technology is built by people who care deeply about what they make. That conviction is in every decision, every component and every product that leaves our hands.
Our core team
Seven people with complementary expertise and a shared drive to build something lasting. Everyone here does real work that matters.
Janne Kjellman
The driving force behind Superstream. Janne leads from the front — hands-on across engineering, product development and wherever else he's needed. He turns vision into hardware.
Mikko Oksalahti
Mikko owns the technical architecture that holds everything together. Systems thinking, IT infrastructure and product development — the backbone that makes the complex manageable.
Daniel Edwards
From circuit design to finished assembly, Daniel covers the full electronics and electromechanical stack. Deeply practical, precise, and always close to the real thing being built.
Jussi Rantapää
Jussi brings software and electronics engineering together with a sharp focus on testing and product quality. His work ensures that what we design performs exactly as it should — every time.
Karoliina Sipilä
Karoliina keeps the company running — clearly, efficiently and without fuss. Administration and organisational structure handled with the same care we apply to the products themselves.
Aapo Hakkola
Aapo drives production development, maintenance and quality assurance, keeping the manufacturing floor at its best. As production team lead, he turns engineering intent into reliable, repeatable output.
Virpi Kainulainen
Virpi is building the team and culture that will carry Superstream forward. Finding the right people — people who care, who grow, who build — is how we get from here to where we're going.