Sarah Chen
Verified ContributorSenior Cloud Solutions Architect
FinTech Cloud Serverless Migrations
High-availability, SOC2-compliant AWS serverless infrastructure for payment pipelines
Project Overview
Architected and executed a zero-downtime cloud migration from expensive legacy dedicated servers to a scalable AWS Serverless Fargate and PostgreSQL RDS infrastructure.
The Challenge
The client suffered from frequent database locks during flash traffic events, paying $14,000/mo for overprovisioned bare-metal servers that were 80% idle during off-peak hours.
The Architecture Solution
Designed an auto-scaling AWS Fargate cluster with Terraform Infrastructure as Code (IaC), AWS WAF protection against DDoS attacks, and automated GitHub Actions CI/CD pipelines.
Technical Architecture Highlights
- Zero-downtime blue/green deployment strategy with AWS Route 53 weighted DNS routing.
- PostgreSQL RDS Multi-AZ failover with read replicas and PgBouncer connection pooling.
- Infrastructure managed 100% as code via Terraform with automated state locking.
- Comprehensive cloud security with AWS GuardDuty, IAM least-privilege policies, and KMS encryption.
Key Features & Capabilities
Auto-Scaling Compute
Scales compute instances from 2 to 40 containers in seconds during traffic spikes and scales down to baseline.
Automated GitHub Actions CI/CD
Automated test execution, Docker container building, and zero-downtime rolling updates on git push.
SOC2 Compliance Hardening
Automated audit logs, centralized CloudWatch metrics, and encrypted backups meeting financial standards.
Disaster Recovery
Cross-region automated database snapshot replication with sub-5-minute recovery point objective (RPO).
“Sarah and the RareBros team migrated our core financial processing infrastructure without a single second of downtime. Our monthly cloud bill dropped immediately.”
Technology Stack
About the Contributor
Over 8 years designing fault-tolerant AWS/GCP cloud environments, automated Terraform IaC pipelines, and SOC2/HIPAA compliance frameworks.
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