
Registration SaaS for sport events
ZonaCrono
Organizers ran registrations through WhatsApp and spreadsheets: chaos, errors and lost hours. Technical decisions: online registration and payment, with atomic slot reservation at checkout to close the race condition that oversold places when several people paid at once. Result: in production, with paying organizers.
zonacrono.com ▶
Exchange-rate data — Venezuela
Akomo
Venezuela runs on two exchange rates at once, with no single source recording both over time. Technical decisions: the bolívar (VES) against USD, EUR and USDT from the central bank (BCV) and Binance P2P, on an append-only log — every sync appends a row, none are updated. Result: everything else is a surface over that log, and the log is the moat.
akomo.xyz ▶