A construction fintech platform lives or dies on one guarantee: the numbers in the wallet are always right. Get that wrong once, and no amount of good design earns back user trust. Here's how Build Me is built to keep that promise.
Four balances, not one
Every user's wallet is split into an Available Balance, a Pending Balance, an Escrow Balance, and a Withdrawable Balance. Separating these prevents the most common wallet bug in fintech: funds that are technically "there" but shouldn't be spendable yet, like money still held in escrow for an unfinished milestone.
Append-only, by design
The transaction ledger never edits history. Every transaction is recorded once, with a unique ID, timestamp, status, type, reference, and audit trail — and new transactions adjust balances going forward rather than rewriting what already happened. If something needs to be corrected, it's corrected with a new entry, not a silent edit.
No negative balances, ever
This is a hard rule, not a guideline: wallet balances never go negative. Combined with constant reconciliation between wallet balances and the ledger, it means the number a user sees on screen is always backed by an actual, auditable trail of transactions.
It's not the flashiest part of the platform — but it's the part everything else depends on.