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AWS Fintech Infrastructure

Section 9 of 9

PCI-compliant VPC design, serverless payment stack, Terraform for regulated infrastructure, WAF/Shield, secrets rotation, and CI/CD controls for fintech

4 hoursadvanced
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Key Takeaways

  • A PCI-compliant VPC isolates the CDE in private subnets with no direct internet route — all external access via NAT Gateway or PrivateLink
  • AWS PrivateLink is the correct pattern for connecting to payment processors without traversing the public internet
  • Terraform with remote state in S3 + DynamoDB locking is the standard IaC pattern for regulated AWS infrastructure
  • WAF + Shield Advanced protects payment APIs from L7 attacks and DDoS — Shield Advanced also gives you the DDoS Response Team
  • CI/CD pipelines in fintech must enforce: SAST scanning, dependency vulnerability checks, and mandatory approval gates before production

📝Personal Notes

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