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Financial ServicesKingdom of Saudi ArabiaLeading Fintech Company

Multi-Cloud Infrastructure for Mission-Critical Fintech Operations

Building a resilient, cloud-native platform across GCP and Oracle Cloud with zero-downtime disaster recovery

  • 99.99% Uptime Achieved
  • <30s Failover Time
  • 10x Scaling Capacity
  • 100% Compliance Ready

The Challenge

A rapidly growing fintech company in KSA needed a robust, scalable infrastructure that could handle high-volume financial transactions while meeting strict regulatory requirements for data residency and disaster recovery. The client required active-active database replication across cloud providers with sub-second failover capabilities.

Our Solution

We designed and implemented a multi-cloud architecture leveraging Google Cloud Platform as the primary environment and Oracle Cloud Infrastructure for disaster recovery. The solution features cloud-native Kubernetes orchestration, real-time database replication, comprehensive observability, and event-driven architecture.

Architecture Deep Dive

  1. Cloud-Native Kubernetes

    • Google Kubernetes Engine (GKE) - Primary workloads
    • Oracle Container Engine (OKE) - DR environment
    • Auto-scaling node pools with spot instances
    • Multi-zone deployment for high availability

  2. PostgreSQL with Active Replication

    • Cloud SQL PostgreSQL (GCP) - Primary database
    • PostgreSQL on OCI - DR replica
    • pg_logical for real-time replication
    • Point-in-time recovery with automated backups

  3. Event-Driven Architecture

    • Confluent Cloud (Managed Kafka) - GCP region
    • Confluent for Kubernetes (CFK) - OCI region
    • Cross-cloud topic mirroring
    • Schema registry for data governance

  4. Service Mesh & API Gateway

    • Istio service mesh for mTLS and traffic management
    • Kong API Gateway for external traffic
    • Rate limiting and authentication
    • Circuit breakers and retry policies

  5. Full-Stack Observability

    • Prometheus for metrics collection
    • Grafana dashboards and alerting
    • Grafana Alloy for unified telemetry
    • OpenTelemetry, Tempo & Jaeger for distributed tracing

  6. Security & Compliance

    • Private clusters with no public endpoints
    • Workload identity for secure service accounts
    • Network policies and pod security standards
    • Encryption at rest and in transit

Technologies Used

  • Google Cloud Platform
  • Oracle Cloud Infrastructure
  • GKE
  • OKE
  • PostgreSQL
  • pg_logical
  • Confluent Kafka
  • CFK
  • Istio
  • Kong
  • Prometheus
  • Grafana
  • Grafana Alloy
  • OpenTelemetry
  • Tempo
  • Jaeger
  • Terraform
  • ArgoCD

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