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Ledgerline
Invoices, cashflow, ledger — on rails.
Ledgerline
Year
2026
Role
Product · Engineering
Stack
Next.js · TypeScript · Canvas charts
Type
Fintech · B2B · Dashboard
The project
A light-mode finance suite for small firms: invoices with real lifecycle math, a running-balance ledger, and a cashflow chart with a palette engineered to survive protanopia — expenses are amber, not red, on purpose.
What we built
- 01Invoice lifecycle where marking paid writes a revenue transaction into the ledger
- 02Running-balance ledger and cashflow chart with validated CVD-safe palette (ΔE 33)
- 03Full CRUD with hydration-safe localStorage persistence and JSON backup