W-01 · 7cars
From one fragile Excel workbook to a ledger-true ERP: every car, investor share and dividend accounted for.
- Live capital & P&L
- Per-car cost & investor split
- Investor ledger & dividends
- Control board & multi-step undo
W-01.S Survey
A growing dealership ran cars, investors and profit splits in one hand-calculated Excel workbook — no roles, no audit, no backups.
W-01.B Build
A mobile-first ERP on Supabase: per-car costing and multi-investor funding, ledger-driven P&L and dividends, a three-currency treasury, audit, undo and nightly off-site backups.
- Client
- Seven Lux Auto, Moscow
- Authorship
- Own build
- My role
- Solo product engineer: proposal, data model, UI/UX, build, deployment and support.
- Stack
- Next.js 16 · React 19 · TypeScript · Tailwind CSS 4 · Supabase · PostgreSQL · Row-level security
- Surfaces
- Web app & installable PWA · desktop and phone
- Languages
- RU · EN · UZ
- row-level security policies
- 28
- Source: from the repository, Sep 2026
- treasury currencies
- USD · USDT · RUB
- Source: from the repository, Sep 2026
- interface languages
- RU · EN · UZ
- Source: from the repository, Sep 2026
- nightly off-site backup, tiered retention
- 22:00 UTC
- Source: render.yaml cron, Sep 2026




























