WILLIAM HUNG · TAIPEI — Software Engineer · Bboy · Blogger
WILLIAM HUNG · TAIPEI
By day, a
Backend and AI services at Appier. Distributed systems, cloud, reliability.
// highlights
Selected work.
- 6h
Critical vulnerability, contained
A CVSS 9.1 endpoint had run unauthenticated since 2019. I shipped the fix in 6 hours, then audited 1.4 million log entries to confirm zero data exfiltration.
incident response · security · forensics - 200
Peak capacity, up 20x
I rebuilt a capacity-bound service into autoscaled pods. It now serves 200 concurrent requests at a 99.5% success rate, up from a hard stall near 10 requests every 2 seconds.
Kubernetes · KEDA · Prometheus · Go - -35%
Infrastructure cost and delivery
I moved services from virtual machines to Kubernetes, then standardized delivery across the backend fleet under one 10-command CI/CD contract.
GitOps · Jenkins · Helm · Terraform
// three roles
One person.
I build software by day, practice on every floor I can find by night, and write about both.
// stack
- Cloud
- AWS · GCP · Azure
- Platform
- Kubernetes · Docker · Terraform
- Languages
- Python · Go · TypeScript
- Delivery
- GitHub Actions · Prometheus