Fintech Knowledge Base

A structured evaluation framework for selecting a PSP for your European SaaS platform, covering fees, methods, features, and risk.

Technical guide to SEPA payment processing for developers, covering credit transfers, direct debits, mandates, and XML formats.

How to integrate with open banking APIs under PSD2, covering account information, payment initiation, and consent management.

Security practices for payment platforms covering PCI DSS scope reduction, encryption strategies, and access control patterns.

A deep dive into idempotency for payment APIs and processing, with practical patterns to prevent duplicate charges and lost updates.

How to build reliable webhook handling for payment notifications, covering verification, idempotency, ordering, and failure recovery.

Technical guide to building recurring payment systems that handle retries, card updates, mandate management, and edge cases.

How to implement SCA correctly in your payment system, covering 3D Secure 2, exemptions, soft declines, and UX considerations.

Production-tested patterns for integrating the Mollie Payments API, covering payments, refunds, webhooks, and error handling.

A clear overview of European payment regulations that affect software developers, from PSD2 and EMD2 to AML directives and DORA.

How to architect subscription billing systems that handle plan changes, prorations, trials, and failed payments reliably.

Proven patterns for integrating payment gateways in Laravel, from abstraction layers to error handling and testing strategies.

An overview of PSD3 and the Payment Services Regulation, covering IBAN fraud checks, open banking changes, and new liability rules.

A technical guide to implementing PSD2 requirements in payment systems, covering SCA, open banking, and consent management.