About the Client
The Client is a next-generation fintech platform built to empower Money Transfer Operators (MTOs). The platform facilitates secure, cross-border transactions with an emphasis on speed, transparency, and regulatory compliance. Their business depends on a stable, PCI-DSS-compliant infrastructure that can scale globally.
Challenges in Fintech Infrastructure
The customer approached ITGix with a pressing need: deliver a secure, PCI-DSS-ready AWS infrastructure for fintech operations in under one week. Their key challenges included:
- Achieving PCI-DSS compliance
- Rapid infrastructure deployment
- High scalability and cost-efficiency
- Secure environment segmentation (Dev, Staging, Prod)
- Full infrastructure automation
- VPN-based secure developer access
- Centralized logging, secrets management, and observability
- Efficient partner integrations with static IPs
The Solution: AWS Infrastructure for Fintech
ITGix delivered a fully automated, multi-account AWS infrastructure for fintech tailored to the client’s unique compliance and performance goals. Our proprietary Landing Zone & Application Development Platform was deployed with:
- Infrastructure as Code (Terraform)
- GitOps delivery with ArgoCD
- EKS-based Kubernetes platform
- Observability tooling with Prometheus, Grafana, and Loki
Goal Achieved: Fully deployed infrastructure in 7 days, ready for PCI-DSS audits and production workloads.
Infrastructure Architecture Breakdown
Building a robust AWS infrastructure for fintech operations requires careful planning across multiple architectural layers. ITGix used its proven methodology to deploy a multi-account AWS setup with scalable Kubernetes workloads, GitOps automation, and enterprise-grade security controls – all aligned with PCI-DSS standards.
ITGix AWS Landing Zone
At the foundation of the solution is the ITGix AWS Landing Zone, designed to provide a secure, scalable multi-account environment for managing cloud workloads. Using AWS Organizations, the team created separate accounts for development, staging, and production environments. This approach enforced strict account isolation and helped reduce the blast radius of potential security issues.
To maintain centralized control without sacrificing flexibility, we implemented delegated administrator roles. These roles allowed designated teams to manage resources within specific accounts while retaining governance at the organization level. Furthermore, Service Control Policies (SCPs) were used to tightly control what services and actions were permitted in each account, reinforcing the client’s PCI-DSS compliance requirements.
Networking & Access Control
Networking was built around a hub-and-spoke architecture using AWS Transit Gateway, which enabled seamless communication between VPCs while maintaining isolation between environments. This architecture formed the backbone of the AWS infrastructure for fintech operations, providing both security and scalability.
Access to internal systems was restricted via AWS Client VPN, integrated with IAM Identity Center for single sign-on (SSO) and centralized identity management. To secure outbound traffic and enforce egress policies, AWS Network Firewall was deployed within a centralized egress VPC. For DNS resolution, the team used Amazon Route 53 Private Hosted Zones, ensuring secure, internal-only name resolution across environments.
Security & Compliance Features
Security was a core pillar of the architecture. We enabled real-time threat detection using a combination of Amazon GuardDuty, AWS Inspector, and Security Hub. These tools continuously scanned for misconfigurations, vulnerabilities, and anomalous behavior across accounts and workloads.
Auditing was addressed with AWS CloudTrail, ensuring complete visibility into API activity across the AWS organization. To defend the application layer, our team configured AWS WAF with both managed rule sets and custom exceptions, including specialized rules for integrations like Stripe webhooks.
Secrets were stored securely using AWS Secrets Manager, with access tightly controlled and rotated automatically. Additionally, the team introduced Just-in-Time IAM access provisioning, allowing temporary permissions to reduce the risk of long-lived credentials – an important requirement for PCI DSS.
Kubernetes & Compute Stack
A critical part of the solution was deploying the ITGix Application Development Platform (ADP) – a fully automated, production-grade container platform built on Kubernetes and tailored for enterprise workloads.
The ITGix Container Platform is an opinionated, yet flexible framework that accelerates cloud-native application delivery. It incorporates a curated set of open-source tools, best practices, and secure defaults – all delivered as code, enabling clients to ship faster without compromising security or compliance.
The platform consists of:
- Amazon EKS (Elastic Kubernetes Service): Providing the backbone for orchestrated container workloads
- Karpenter: A modern Kubernetes autoscaler purpose-built for EKS. It dynamically provisions optimized compute nodes based on real-time demands, supporting both Spot and On-Demand instances for cost-efficient elasticity
- ExternalDNS: Automates DNS record management based on Kubernetes services and ingress resources, keeping DNS zones always in sync
- External Secrets Operator: Syncs secrets securely from AWS Secrets Manager into Kubernetes, maintaining centralized and auditable secrets management while enabling seamless injection of secrets into workloads
- ArgoCD: The GitOps engine powering continuous delivery. It ensures application state matches the declared configuration in Git repositories, providing zero-touch deployments and full traceability
- ArgoCD Image Updater: Automatically detects new container image tags and triggers a Git commit followed by a sync, enabling rapid rollout of updates in development environments
- AWS WAF on ALB Ingress: Integrated via annotations to Kubernetes Ingress resources, applying fine-grained Layer 7 protection through both AWS Managed Rule Sets and custom WAF rules tailored to business needs
This setup drastically improved developer velocity, enhanced security posture, and enabled compliant, repeatable deployments across environments.
Data Layer
The data layer of the AWS infrastructure for fintech was designed for both performance and security. The data was hosted on Amazon Aurora PostgreSQL, offering high availability, automatic backups, and encryption at rest. For low-latency caching, Amazon ElastiCache (Redis) was deployed in isolated subnets to keep it shielded from public exposure.
To support centralized observability and auditability, application and infrastructure logs were ingested through Amazon CloudWatch, routed via Kinesis Firehose, and stored in Amazon S3. This provided long-term retention and powerful search capabilities for logs, metrics, and traces – all essential for compliance audits.
CI/CD & GitOps Automation
Deployment pipelines were built using GitOps principles, with ArgoCD at the center of the automation strategy. All application manifests and configuration changes were stored in Git repositories, ensuring version control and auditability for every deployment. With ArgoCD continuously syncing the desired state from Git to the cluster, the client achieved reliable, repeatable, and fast application rollouts.
To further enhance developer velocity, ArgoCD Image Updater was integrated. This tool allowed automatic updates of container images based on tags or versioning rules, enabling zero-touch deployments for development environments and reducing time-to-market for new features.
Business Outcomes & ROI
The new AWS infrastructure for fintech enabled the customer to:
- Launch PCI-DSS-compliant infrastructure in 7 days
- Achieve 100% Infrastructure-as-Code coverage
- Deploy without manual intervention using GitOps
- Reduce developer onboarding time significantly
- Improve integration with fintech partners via static IP egress
- Support high availability and horizontal scalability
Final Thoughts
In a market as fast-moving and regulated as fintech, speed and compliance are critical. The collaboration between ITGix and its client proves that secure, scalable, and compliant AWS infrastructure for fintech can be deployed in record time using the right tools and automation principles.
Looking to build a PCI-DSS-ready AWS foundation for your fintech? Get in touch with ITGix and see how we can help.