Yany Choi

Summary

SRE specialized in infrastructure design and operations in cloud-native environments
Proven track record in improving reliability and cost optimization of AWS and Kubernetes-based systems
Broad technical expertise spanning frontend, backend, and DevOps
Bilingual in Korean and English (5 years of residence in the U.S.)

Site Reliability Engineer, SRE Team Cloud Part Jun 2025 - Present

Site Reliability Engineer, Infrastructure Team Jul 2024 - Present

Kubernetes
- Reduced monthly costs by $10,000 through Karpenter adoption and HPA implementation
  - Published internal blog post on Karpenter scheduling logic
  - Developed Disruption Controller to enhance service workload stability during disruption processes
- Enhanced Istio environment
  - Achieved zero downtime by implementing Canary deployment for version upgrades
  - Improved metric context through Istio AttributeGen and EnvoyFilter implementation
  - Created Helm Charts for Istio-coupled resources, managed via ArgoCD ApplicationSet
- Implemented Mimir for HA metric pipeline, reducing costs through minimal inter-AZ communication
AWS Network Architecture Redesign
- Restructured network architecture to control traffic through Centralized VPC
- Enhanced traffic control by replacing NACL + SG with AWS Network Firewall using Suricate Rules
- Optimized inter-VPC routing through centralized TGW with traffic-specific routing tables

DevOps Engineer, Intern, Infrastructure Division Jun 2023 - Aug 2023

Refactored and developed UI for integrated deployment tool combining commits, container images, Jira tickets, and Slack messages
Designed and executed load tests for new service launches and performance improvements
Participated in GitHub Action runner migration from Amazon Linux to Ubuntu 22.04

Software Engineer Intern, Dev Team Mar 2022 - Sep 2022

Expanded role progression: Frontend → DevOps → Backend
Reduced downtime by 90% (from ~1 hour to 5 minutes daily) by migrating monolithic backend from EC2 to AWS ECS + Fargate
Established CI/CD pipelines and managed infrastructure (GitHub Actions, Terraform)
Developed and deployed new influencer platform web app (Next.js, FastAPI)
Maintained Next.js web app and developed new components

Interactive Map Service Highlighting Population Density and Trending Locations

Managed CI/CD (Github Actions) and infrastructure
Implemented cluster GitOps system using ArgoCD
Deployed monitoring stack (Grafana, Prometheus, Tempo, Loki) with OpenTelemetry on k8s cluster
Resolved LG U+ router NAT hairpin limitation by implementing custom DNS server (Blog)