payments-general

Implement payment orchestration with automatic PSP failover using a routing layer

Submit Level 3 card data on B2B transactions to qualify for lower interchange rates

Implement incremental authorization for hotel reservations to capture additional charges at checkout

Implement merchant-initiated transactions (MIT) for subscription renewals using the CIT/MIT framework

Implement smart retry dunning logic for failed subscription renewals

Handle partial captures and overcaptures for variable-amount transactions

Implement surcharging for credit card payments in compliance with network rules

Set dynamic statement descriptors per transaction to reduce friendly fraud chargebacks

Build multi-PSP reconciliation by normalizing settlement files from Stripe and Adyen

Minimize PCI DSS scope using tokenization and determine the correct SAQ level

Compile compelling chargeback dispute evidence aligned with card network requirements

Implement a correct refund state machine handling async refunds, failed refunds, and partial refunds

Implement idempotent payment retries to prevent double-charges after network timeouts

Set up an effective payment testing strategy in CI using test clocks, simulator cards, and sandbox safeguards

Handle currency minor units correctly across payment providers to avoid 100x over- or under-charges

Implement a reliable webhook processing pipeline with verification, deduplication, fast ack, and polling fallback