I'm Jérôme Cremoux, 44, a French software developer. Unlike many in this industry, I hold no degree: no engineering school, no university. I fell in love with code as a kid, and I simply never stopped. Everything I know comes from open source, from personal projects, and from years of learning by building, breaking things, and reading other people's code.
Nothing about my path was a straight line. I spent five years behind the service desk of a store, fixing customers' computers, coding at night for the love of it, until a short vocational retraining let me finally make it my job. Then six years in a small software house, growing from developer to lead developer across mobile, web and backend; a spell as a consultant; and today I work as a technical lead on 3D data visualization for the space industry. From a repair counter to spacecraft, the self-taught way: passion did the heavy lifting.
I love creating. What drives me is curiosity, and it refuses to stay in one lane. I care about UX and graphic design as much as I care about code; I model in 3D; I love software architecture and things being clean, square, done right. Above all, I can't let go of a problem until I've answered the two questions that matter: why, and how.
Open source raised me as a developer, so working for it now feels like giving back. But it's more than gratitude: I believe the open commons is the last independent space we have left, the only real counterweight to a handful of giant platforms deciding what our digital lives look like. I want my work to strengthen that space, not feed the other one.
That's what Helios and Helios Forecast are to me: my contribution. Free tools, built in the open, that help people see and understand their energy. Technology at its best doesn't capture people, it empowers them, and if I can spend the rest of my career on that side of the fence, trying to leave the world a little better than I found it, I'll consider it time well spent.
I'm Jérôme, 44, the developer behind Helios. For years I've worked across the whole stack, backend, frontend, 3D, games, embedded, and at some point I wanted to finally build something that actually matters to me.
A card in a dashboard won't save the planet, and I know it. But doing nothing was never an option for me. Guilt doesn't change people, and neither do numbers nobody reads: people change when they can finally see what's happening in their own home. That's the whole point of Helios, and the reason I pour my evenings into it: make energy visible, tangible, even beautiful, so acting on it stops feeling like a duty and starts feeling obvious.
Helios is free and open source, built by one person in the open. A star on GitHub helps others discover it, and a coffee keeps the project alive and keeps me building.
