Context
Joya Energy offers solar installations with no upfront investment to small and medium businesses in Tunisia, under an ESCo model: the company finances the installation and the client pays from the savings.
My role
As lead developer, I designed and delivered the platform from the architecture to production, with React on the front end and Node.js with a relational database on the back end.
What I built
- Audit and simulation tool for the sales team, used to assess a prospect and size a solar project.
- Joya OS dashboards that let clients follow their energy savings.
- Business rules modelled with the experts: I worked with an energy engineer and the CEO to turn their know-how into calculation rules: the STEG tariff grid, the price per kWh depending on usage, internal rate of return (IRR) and ESCo financing scenarios.
Result
The platform is in production with the first 3 clients.