DevSecOps and Homelab Exploration
Built self-hosted infrastructure and Kubernetes clusters to practice hands-on observability, vulnerability management, and security operations.
DevOps / DevSecOps Portfolio
Building secure, scalable cloud systems with strong operational judgment.
Hieu Nguyen Focusing on AWS infrastructure, automation, and the realistic trade-offs between cost, security, and long-term maintainability.
Featured Case Studies
Operational stories with clear constraints, actions, and impact.
OperationsScalabilityContainers
When Managing Servers Stops Scaling: The EC2 Bottleneck
Infrastructure growth outpaced operational capacity. As business requirements scaled, the number of EC2 instances multiplied across environments, turning day-to-day maintenance into a time sink.
Sep 2025Published
ArchitectureTrade-offsCost Optimization
Pragmatic Architecture: Over-Engineering is a Tech Debt
Cloud "best practices" can become a liability if they are applied blindly to small workloads without considering business scale and operational constraints.
Jun 2025Published
FinOpsTrade-offsOperations
Cost Optimization vs. Operational Complexity: The Hidden Cost of Saving Cent
Cloud cost reduction is a trap if it introduces maintenance overhead and operational risks that outweigh the actual dollar savings.
Jan 2025Published
Timeline Highlights
AWS Platform Ownership
Managed multi-team AWS environments. Architected core IAM, logging, security, and monitoring foundations, and drove Terraform adoption.
Infrastructure and Multi-Account AWS
Shifted infrastructure to Infrastructure as Code (IaC) using Terraform. Isolated staging and production environments by designing a multi-account AWS structure.
Serverless and Cloud Operations
Owned AWS application infrastructure. Optimized Lambda scaling and built automated deployment pipelines to modernize legacy and production systems.
Selected Homelab
KubernetesK3s
Quick Experiment: K3s Cluster (ECS vs. K8s Reality Check)
Exploring Kubernetes through K3s and discovering that it behaves more like a cloud platform than a simple container orchestrator.
May 2026Published
DevSecOpsSecurity
DevSecOps Exploration Lab
A self-hosted environment built on Proxmox to move from pure DevOps into DevSecOps.
Mar 2026Published