Donald Tong

• Backend Engineering: Built and maintained scalable Java/Spring Boot microservices in distributed production environments.
• CI/CD & Automation: Designed Jenkins pipelines with Maven and Git, reduced manual deployment steps and streamlined integration across dev, staging, and prod.
• Incident Response: Triaged production issues via Linux log analysis, authored runbooks for recurring failure patterns, and reduced mean time to resolution.

• Customer Service & Operations: Managed front desk operations including appointment scheduling, register transactions, and real-time resolution of customer concerns, maintaining composure and clear communication in a high-volume, fast-paced environment.

• Networking & IaC: Provisioned a production-patterned VPC (public/private subnets, IGW, NAT instance, route tables) across 2 AZs using Terraform with 100% IaC coverage.
• Troubleshooting: Diagnosed and resolved 3 intentional misconfigurations — security group rule removal, missing default route, incorrect ALB health check path — using AWS CLI and structured runbooks.
• Observability: Built a CloudWatch + SNS alerting pipeline with 4 alarms (CPU, EC2 status check, ALB 5xx, unhealthy hosts) and verified end-to-end email delivery.

• IaC & DevOps: 100% Terraform-provisioned stack (S3, CloudFront, Route53, DynamoDB, ACM) with GitHub Actions CI/CD for automated deployments and a Python Lambda visitor counter.
• Security: Hardened origin access via CloudFront OAC and enforced global HTTPS encryption via ACM — zero direct S3 exposure.

• IaC & DevOps: Provisioned AWS EKS cluster with Terraform; automated Docker builds, ECR versioning, and zero-downtime rolling update deployments via GitHub Actions.
• Observability: Deployed Prometheus and Grafana with OOMKilled pod alerts and CPU/memory utilization dashboards for real-time root cause analysis.

Virtual Enterprise Home Lab

• Infrastructure: Architected a virtualized Windows Server environment featuring Active Directory for identity management, alongside DHCP and Group Policies to simulate enterprise network administration.