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How to build multi-PSP redundancy that works in production: intelligent payment routing rules, failover testing, and what breaks without them.

Creative briefs, deep dives, and case studies oh my!

PCI DSS 4.0 requirements affect how developers build payment systems. With future-dated requirements now mandatory as of March 2025, here’s what changed in Requirement 6 for secure development, the new MFA rules in Requirement 8, and how to reduce your PCI scope through architecture choices.
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A complete PCI compliance checklist covering all 12 PCI DSS requirements, v4.0 changes that became mandatory in March 2025, and how tokenization and outsourcing can reduce your compliance scope by 93%.
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