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Infrastructure·13 min read·
Real-time ledger design patterns for fintech products
Double-entry isn't optional. Event sourcing, holds, and reversals — a field guide for engineers shipping money.
Rise Engineering
Platform & infrastructure
A ledger is the source of truth for customer trust. If it lies, your support team becomes the reconciliation system.
We model every user-visible balance as derived from immutable entries. Holds, captures, and releases are separate events — never silent mutations.
Reversals get new entries; they don't delete history. Regulators and accountants both prefer the trail.
Start with strict invariants in code, not spreadsheets after the fact.
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