Engineering Global Multi-Currency Checkout Pipelines: Stripe, Razorpay, Webhooks & Ledger Reconciliation

Payment reconciliation starts with an idempotent state machine

Separate payment_intents, provider_events, refunds and settlement_lines. Store amounts in the correct currency precision and never assume every currency has two decimal places. Confirm provider signatures before acknowledging a durable event.

Workflow and data ownership

Checkout intent → provider authorisation → signed webhook → ledger posting → settlement match

Confirm each system of record, the event owner and the recovery path before implementation. The sequence above is a proposed design for discussion, not measured production performance.

3. The 8 Core Functional Modules Included in This Architecture

The custom platform is engineered with eight deeply integrated operational modules designed specifically for FinTech & Payment Processing:

Failure cases and acceptance checks

Test duplicate and out-of-order events, partial refund, chargeback and a successful charge after the browser closes. Reconcile provider fees, exchange differences and net settlement instead of matching gross invoice totals only.

Scope, measurement and handover

Agree the first release, test data, permissions and acceptance evidence in writing. Record the current operating baseline before setting targets. Hand over the accepted code, configuration and runbook under the project agreement; hosting, external APIs and maintenance remain separate budget items. Review the related service or guide.