Projects

US Medical Resource Logistics System (Siglus)

When: 2022.07 - 2022.10
Stack: AWS, EFK, Terraform, Java, Docker, PostgreSQL

This project supported a healthcare logistics system aimed at helping an African country build a medical supply chain infrastructure.

Configured AWS Lambda with Terraform to automate scheduled EC2 start/stop and reduce waste
Built Prometheus-based monitoring and alerting, created Grafana dashboards, and forwarded alerts to WeCom through Flask
Used Ansible to manage test VMs and helped assemble deployment packages
Independently explored SkyWalking integration to improve monitoring and performance analysis

When: 2022.10 - 2024.12
Stack: Azure, NestJS, Next.js, Docker, Kubernetes, Ansible, Istio, Vault, Terraform

This Singapore public-health system supported COVID-19 ART/PCR appointment booking and result submission.

Migrated CI/CD from Bamboo to GitLab CI and optimized parent-child pipelines for a monorepo
Maintained and upgraded deployment tooling with Ansible
Resolved a long-standing Terraform state synchronization issue shortly after joining
Managed migration from Azure Single Server to Azure Flexible Server, including schema and networking challenges
Operated services with Istio to strengthen service reliability and security
Mentored junior teammates on Terraform, Kubernetes, and CI/CD practices during project iterations

When: 2024.08 - Present
Stack: Azure, Node.js, Docker, Kubernetes, Ansible, Helm

This project focuses on digital health services for children, serving both parents and public health organizations.

Served as the sole DevOps engineer, independently managing cloud ops, tool upgrades, monitoring, and CI/CD
Participated in infrastructure rebuild and cloud migration, taking on stronger coordination responsibility during team lead absence
Handled production dependency issues, made fast recovery decisions, and strengthened monitoring and fault tolerance
Improved deployment workflows with Helm and refined project monitoring metrics