Cloud Support Engineer (Deployment)  •  Amazon Web Services

• Helped to reproduce and resolve customer issues for AWS services including VPC, EC2, EKS, ECS, aws-cdk, etc.

• Helped to identify issues/bugs in Amazon managed open source projects, e.g. aws-cdk and provide PR when applicable.

• Provided feedback to internal AWS teams on how to improve services.

• Wrote tutorial (technical article) for internal knowledge sharing, e.g. how-to provision Kafka cluster with SSL enabled on Docker

Oct 2021 - Now

DevOps Engineer  •  Linc Global

• Upgraded k8s cluster to latest version, while also migrated from Kops to AWS EKS, using Terraform, Helm.

• Built a Prometheus based monitoring stack for k8s clusters using Helm chart kube-prometheus-stack, with a set of official/ community built dashboards.

• Built a test management tool, which allows QA team to create test project and document test cases, using TestLink, MySQL.

• Built CI/CD for multiple projects using Github Actions, Jenkins, Serverless, and Pytest.

• Established/enhanced the Python local developing environment to reduce the gap from it to dev integration environment.

• Identified and resolved multiple low hanging fruits to reduce costs for AWS services. For example, converted EBS storage type from gp2 to gp3 saved $280+/month.

• Analyzed server access logs for Linc platform using AWS Athena for a security issue.

• Ran load tests using k6, to dig into a memory leak issue on Node.js running inside K8s/docker.

Jan 2021 - Oct 2021

DevOps Engineer  •  Splashtop

• Organized monolith Terraform configurations with modules and shell scripts. Modules are defined as networking, eks, db, security, etc.

• Better k8s resources management by Namespace, Label, Affinity, NodeSelector, Taints.

• Developed Helm charts for backend applications, including Deployment, Service, Ingress, Job, and/or RBAC.

• Deployed backend resources on AWS services, such as EKS, API Gateway, Fargate, Lambda, etc.

• Developed CI with CircleCI and Github Actions, from test to build.

• Developed CD with ArgoCD, with concept of GitOps and git branch workflow.

• Reduced backend pod startup time from ~6m to ~2m, by adjusting health check probes.

• Deployed secret storage by Hashicorp Vault, to put/get the secrets from inside/outside any k8s cluster.

• Ran load tests using k6, to resolve issue of insufficient workloads.

Jul 2020 - Jan 2021

DevOps Engineer  •  HTC Viveport

• Migrated all Viveport services to Kubernetes based infrastructure, which has served 300+ micro-services and API online, using Kops, Terraform, and Istio.           

• Built deployment pipeline to automate the integration of software releases (CI/CD) to environments including develop, qa, staging, and production, using Azure DevOps.

• One of the speakers of Kubernetes Summit 2019 in Taipei, which is a public event aiming to share knowledges about Kubernetes held by iThome.

• Shared base knowledge of Kubernetes for Viveport engineering teams, and how we implemented it with CI/CD pipeline.

• Developed several monitoring mechanism to maintain the availability and reliability of all services, using ElastAlert, Prometheus, Grafana.

• Developed/maintained logging system including traffic access logs, database requests, errors on server/client side, using ELK Stack.

• Supervised any modification to NoSQL database while maintaining the integrity and performance of all db clusters, using mongodb.

• Identified changes that are necessary to maintain optimal system performance while liaising with management to efficiently target and deploy solutions.

Dec 2016 - Jul 2020