Cash-flow management application for small businesses. Lets users see all their bank-account balances in one place, aggregates transactions, classifies them, does lightweight accounting (so users do not have to wait for an accountant once or twice a year), and produces cash-flow and related reports. Integrates with banks via third-party open-banking providers that deliver data through webhooks. Ruby on Rails monolith (rails_event_store + Sidekiq + a single Postgres database), partly written in 'startup mode', evolving gradually from CRUD toward event-driven CRUD hybrid with selected aggregates and read/write separation.