Dollar wallets, point accrual and settlement, paybacks, referral rewards — services whose core state is a balance. I built the backends and admin consoles under contract, with ledger consistency as the first design constraint, because code that counts money is not allowed to drift.
Key results
Four domains: wallet, points, payback, rewards
Service plus admin console, as a set
Ledger consistency first
- Role
- Full-stack Contract Work
- Year
- 2023–2025
- Stack
- TypeScriptNestJSMySQLRedis