Fintech Knowledge Base

In-depth guides, best practices, and expert insights for fintech professionals.

Payment Orchestration: When and How to Route Across Multiple PSPs

When payment orchestration makes sense, how to implement PSP routing, and practical patterns for failover and optimization.

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Fraud Prevention in European Payment Systems: A Technical Guide

Practical fraud prevention strategies for European payment systems, from velocity checks to machine learning scoring.

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Multi-Currency Payment Processing: Technical Challenges and Solutions

How to handle multi-currency payments correctly, covering exchange rates, settlement currencies, display, and accounting.

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Chargeback Handling and Prevention for Online Payments

How to handle and prevent chargebacks in online payment systems, covering dispute flows, evidence submission, and reduction strategies.

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Automating Payment Reconciliation for SaaS Platforms

How to build automated payment reconciliation systems that match PSP settlements to your internal records and catch discrepancies.

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How to Choose a Payment Service Provider for European SaaS

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

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SEPA Payments: A Developer Guide to Credit Transfers and Direct Debits

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

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Open Banking API Integration: A Practical Development Guide

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

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Financial Data Security for Payment Platform Developers

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

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Idempotency in Payment Systems: Why It Matters and How to Implement It

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

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Webhook Handling Best Practices for Payment Systems

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

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Building Reliable Recurring Payment Systems

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

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Implementing Strong Customer Authentication (SCA) in Payment Flows

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

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Mollie API Integration Patterns for Production Applications

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

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EU Payment Regulations: A Developer-Friendly Overview

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

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